Do not ever, EVER use Hartz products on your pets

I am currently in college studying Veterinary Medicine. Hartz products are DANGEROUS. we specifically discussed that in class. They are known for making animals ill, and unfortunately–killing cats. Dogs can tolerate pesticides better than cats (even though it is dangerous for both). Harts flea and tick control products contain pesticides, Deadly for cats, dangerous for dogs. PERIOD. Hartz have many lawsuits against them, and they do need to be shut down. If you have any signs of adverse effects (which seems to always occur with EVERY Hartz products) discontinue use IMMEDIATELY. As a matter of fact, DO NOT USE IT AT ALL. Things that can occur are rash, itching, blisters, bumps, seizures,loss of appetite, fever, vomitting, etc. and even, unfortunately, death. If you need flea and tick control, for your pets sake, please use Frontline. It is the safest product, and Veterinareans number one choice for a reason.

117 Replies to “Do not ever, EVER use Hartz products on your pets”

  1. I’m confused. I am hearing and reading so many negative comments about this product. I have used it twice now and neither one of my dogs nor our cat has ever had a problem with it. Maybe we are just the lucky few and i now know about the adverse side effects I keep reading about but if the product is so bad why is WalMart selling it? Im very confused. I am simply a pet owner attempting to rid my animals of fleas. Why are my dogs immune?

    I applied the most recent dose yesterday morning and it has now been over 24 hours with zero side effects.

    Any thoughts….


    1. Not all animals will have a reaction from it, however there are cases of animals having a reaction to it even when they used it previously. It is not worth the risk of possibly causing your pet to become ill, distressed, or even dead. They’ve been able to keep their products on the market somehow despite all the cases of animals suffering from it. Don’t ask me why or how. It is common knowledge in the veterinary community that this brand is dangerous but it’s sold over the counter and pet owners have no idea.

    2. It’s hit or miss as to which pets are affected. I had 3 cats, 2 were brothers, and the 3rd was from a different litter.
      I used Hartz flea powder on all of them. The 2 brothers were ok, uneffected, but the 3rd cat wasn’t so lucky.
      My poor Tigger became very sick within about 4-5 hours. Took him to emergency vet hospital. They said all they could do is flush his system & even with that, his chance of survival was very low.
      He died the next day.
      I was so upset, heartbroken & FURIOUS.
      How can they sell products with deadly ingredients????
      They’ve been getting away with it for many years.

          1. Hello, reading through some posts. I am also seeing my furbaby struggle, I gave her a bath with Hartz flee shampoo. In the process of drying her it it started, shaking, twitching, loss of balance, no appetite, all in all very ill. I took her to the vet, sure enough the toxins from the shampoo..Hatrz needs to be removed from the market, lawsuit need to happen…sHe may not recover from this and a once happy joyful Maltease is now having seizures and spasms….shame on them

          2. Hi, I used this product on my two dogs and they are sick! My dog is 7 lbs and could not stand this morning, she was crouching to the floor, could not stay on her feet. Her back was hunched over and her whole body was shaking uncontrollably. When we picked her up her limbs would retract and fold, she couldn’t stretch out. This is a dangerous product, do not use it on your pets. Both of my dogs had a horrible reaction to it.

        1. Mine, too. I used Hartz Sergeants flea meds on our 9 cats and two large dogs (over 100 lbs.) and they all were SO sick! Two of the cats nearly died.

          Within 45 minutes to an hour after application, one cat had a seizure, one simply fell over. After consulting our vet who all but screamed when she learned that I had used that product, I did the only thing I knew to do — washed all eleven victims thoroughly with blue Dawn dish soap. Used two large containers of cottage cheese in an attempt to further flush their systems.

          It took almost 24 hours for them to come around to normal except the cat that had a seizure. For two more days, he walked with a head tilt and his legs and head looked like they were vibrating. Vet said it was neurological damage. After EIGHT days, he was back to normal.

          Although I immediately contacted Hartz, the representative I spoke with came across as nonchalant and treated the situation as though it were the norm! About three days later, I received a follow up call from a different rep — I returned the two unused flea colors and the empty boxes of flea medication along with my receipt. I received only a refund on the products.

          Horrible, horrible experience!

          PS: No need to think I am an animal hoarder — we live on a farm. 😅😁

          1. Personally, I bathed with the flea shampoo. I was out of human shampoo. Ten minutes later I developed a rash and broke out in hives. It took two days to subside. Bad experience. Now i crave mighty dog dog food.

          2. So my dog a Jack Russell Terrier Chihuahua mix had to be put down on June 20, 2020 because she had uncontrollable back to back seizures for days. I had applied the Hartz flea and tick stuff on her on May 18th 2020. She was never the same again. She started seizing uncontrollably, was anemic and couldn’t eat. Her little head was bobbing lol the time and she started at one spot for at least 2 minutes. Her body stiffened up, her paws were retracted and she twitched. How much more do pet owners have to say before this product is taken off the market? If you continue to use this product, please reconsider what you are doing to your pet. This product has some very harsh chemicals that are killing pets. If you really love your animal, please STOP using this product. It’s for your pets protection that we are warning you. My other dog, an Australian shepherd/Golden Retriever mix is a bigger dog weighing 45lbs. The side effects were not as bad for her, but for days she was in pain and it hurt to walk. She would yelp and buckle down in pain for a while. The vet gave her some muscle relaxers which helped a little. She’s okay now, but never am I going to go cheap only to kill my pet of 8 years. I hate to think we did this to our pet. Please do your research before you help kill your pets. These products are lethal. Obviously, the reactions are different for every pet, but just BE CAREFUL !!!

        2. I just lost 2 dogs in 2 days. The youngest one first on supposed liver failure, and now today my oldest at 15.5 years of age. My youngest was 13 and very much alive and happy! I’m lost for words right now, something chemically happened to my dogs.

        3. Hi Rosa.
          My name is Anna Thompson. I lost a dog to Hartz flea drops in less than 7 days he had to be euthanized at an Emergency vet office. Everyone in the office thought I was out of my mind “ flea drops can not kill your pet ‘ but there he was in total renal failure. I lost my best friend that night and to this day I blame my self for his death. So I think that this is still happening to other animals is a travesty. Please stop them.

        4. My cats have both had issues with this product. I had been using all natural products that worked fairly well, but needed something more substantial when one of the cats got outside. I made the mistake of using this product. One cat got bald spots, blisters, and hives after just a day. The other kept drooling, barfing, and stayed ill almost immediately after contact. They need to be shut down. Even washing it off didn’t help, as this product is MEANT to absorb into the skin.

          1. I gave my eight year old cat a flea treatment yesterday. Today he was hiding in my closet, which is not like him. He’s very interactive. He just doesn’t seem himself. So I googled Hartz as I noticed “pesticide” as an ingredient. I thought, that can’t be good. Why are they allowed to sell this. I feel terrible that I’ve made my kitty sick. I will be following up with the Hartz Company and will call my vet tomorrow. Shame on Hartz!

      1. Can you please disclose what symptoms Tigger had? My cat is starting to experience hot, red and slightly blistering skin but I washed the product off about an hour after application and have not seen anymore visible signs of distress but I do not want to miss anything.

        Thank you and I am so sorry about your kitty, I couldn’t imagine.

      2. My cats had the Hartz flea collars put on them less than 24 hours ago, now they have lost the hair on their necks and have painful blisters, I am in tears, I never knew that this company could be so heartless and sell basically poisionous product! How are they getting away with this and what can we do about it? I feel so horrible for my fur babies and very guilty that I put them through this but I am curious with Hartz!!!

        1. I had the same issue too! I bought the flea and tick collar and notice under the collar my kitty was losing hair. I quickly removed it and shower her right away to get any residue off. She has a couple bald spots around her neck. The skin looks dry and painful. I literally wanted to cry too. I thought this product would help me kitty, but it made it so much worst. I don’t even know what to do.

    3. Having suffered the effects of toxic chemicals, you won’t know until it’s too late, or you won’t notice at all. You may attribute damage two years from now to age or some disease.

    4. Not every pet will have a reaction but I think enough have that it should be taken off the market. Yes it’s sold at Walmart but so are food brands like “gravy train” and those are horrible for dogs. It’s just the cheaper easier route. It’s worth it to pay more to know you are getting a reputable and quality product.

    5. I unfortunately used this product on my cat 2 days ago and this morning she didn’t wake up I am heart broken and Hartz needs to be shut down I lost a family member because there product the vet even asked if it was this particular brand and said it’s not the first case they have had

    6. For one thing; the author of the original post about NEVER using Hartz products on your pets CLAIMS to be a vet student, but his inability to spell veterinarian and his atrocious grammar seem to make his claims suspicious. The internet is so full of these spurious types of claims; that I would get my information from a more reliable source. Science and medicine will both tell you that ANECDOTAL accounts are not reliable; meaning all of these stories posted by people online. I am sorry if people have lost pets, but blaming it on Hartz without proof is similar to the anti-vaxxers claims that vaccines killed/made autistic/fill in the blank their child. As a healthcare provider myself (people; not animals), I would say: ask a trusted vet. Cause of death in general must be proven by pathology reports, NOT opinions. All I know is, as a lifetime pet owner, my parents always used Hartz products without a problem, and as a suspicious person by nature, I would not be surprised if this rumor wasn’t started as corporate sabotage by the Frontline manufacturers. Long story short: don’t be the idiot who gets all of their “information” from the internet. It is totally unregulated and people can say just about anything they want.

      1. I actually spoke with my veterinarian about using their products on my animals . All three veterinarians at my local clinic adamantly spoke against using their products due to the issues they’ve seen occur with animals Up to and including death . So being that this cake from trained professionals I think I’ll take their word .

        1. AVOID AVOID AVOID. This product almost killed our 1 year old cat. We unknowingly purchased this product and thought it was safe to use on our kitty. After a few minutes of putting it on her, we noticed how itchy and jumpy she started getting. Anytime I would get near her she would hiss and try to swipe at me. I noticed that she started drooling from her mouth and immediately knew something was going on. I grabbed her and took her inside the bathtub to rinse her off. Although I feel as if she’s feeling better & finally sleeping, I am worried someone else might not be so lucky.
          We made sure to call a vet and see if there is anything else we can do.
          She’s still distraught and jumpy and I can tell she’s still itchy and uncomfortable. Beware: do not buy this product nor use it on any animals.

      2. I got the same feeling. I’ve been using these products off and on, usually because if the expense. However, I have noticed that they really don’t work that well. The best use has been simply when my pet is stinky. I stopped using Hartz brand because it’s not effective. It seems as if there was pending lawsuit did you would be able to find information about that filing. If you’re not a hundred percent sure that you can trust what you see on the internet then go to the source.

      3. sorry but I used hartz dewormer on my cat and he immediately started having seizures and was left with neurological problems. I will never use the product again. I believe they have a quality control problem with whoever manufactures these products.

      4. Completely agree with you. I read so much stuff on the ‘net that I know just isn’t always factual or the truth.

        I had two cats, and no, the Hartz Products did not cause their demise, one lived to be 15-1/2 and developed diabetes {NO FAULT of HARTZ!}, the other at 18-1/2 years was done in by a VET TECH’s INCOMPETENCE, again not by Hartz Products. Both cats tested for what their symptoms came from, 1 was just age, the other INCOMPETENCE.
        I used to use Hartz Waterless Flea and Tick Shampoo on BOTH these cats, and I used it for years, before it got taken off the market for whatever reason. It NEVER harmed or caused my cats any issues with their health at all.

        I was actually hoping to find the same EXACT product for my current cats, but it appears that it is no longer available.

        But it worked and it worked very well. It WAS a good and reliable product. And on top of that, at the time {in the Mid to late 90’s} we had a few different and trusted vets due to moving into other areas in the same city, and the vets always said using it on my cats was just fine.

        I’ve tried using a different brand, an ORGANIC plant based Waterless Flea and Tick Shampoo from Vet’s Best and this stuff is a total waste of your money. We thought we’d try the organic and supposedly “safer” route, but it didn’t work to kill or rid the cats of their fleas at all. We also had a person spray some “organic: safe for pets” in our home, it KILLED two of our cats, 1 was just going on her 2nd birthday, the other was almost 3 years old.

        So as far as I’m concerned “organic products” are MURDERERS too! And I’d NEVER RECOMMEND ANY ORGANIC PRODUCT TO ANY PET OWNER EITHER! Not from my experiences with them being dangerous and killing your pet{s} off, leastwise to say totally useless for what they claim to be.

        And I like Frontline, but it shouldn’t be so blasted expensive either. The price for their product is totally outrageous, especially for folks like me that are Seniors and have limited income levels. And if y9u have a multi-cat household as we do.

        So I just try and use Dawn dishwashing liquid, as the fleas don’t seem to like it very much and it’s been working on our cats now for a little while. Plus I have a few Flea Traps down that trick the fleas into jumping into them by the heat of a small 7W nightlight bulb {heat is what attracts the fleas!} and then they get caught on the ciruclar sticky pad and die there. The pads are non-poisonous, so there safe for your pets,. but they can get the trap papers stuck to their paw or nose if they stick it in there. Been using these for years, safer than any flea poison for you pet. And they work really great too. They sure keep the flea populous down and in check in my home.

      5. You must be stuck on the stupid bus heading for moronville… Open your eyes dummy the fact that all these people are here claiming the same thing makes your suspicion seem that of a fool.

      6. Finally a voice a reason. I have been using Hartz products for over 40 years, many dogs, many cats and have NEVER had an issue.

    7. Yes your dogs mightbe lucky but not next time. Kidney and liver can only take certain amount of toxins and next time your dogs will be having high degree skin burns and die just like it just happened in Dubai to one of the dog owner. She lost one of her 2 dogs and the second is fighting for life. She used Hartz ‘gentle shampoo’ for puppies!

    8. my cat had seizures from cutters which is basically the same thing as a costed me $450 to keep her alive! Hartz killed my brother’s cat.

    9. I used the flea medication once in my cat…he got huge blisters on his back, it was awful and took forever to heal! Unfortunately there are cheap versions of everything in life, for some things it doesn’t matter, but they are generally made with cheaper ingredients making them less effective and potentially dangerous. Many pet products are not regulated the same as human products as well.

    10. Products that are intended for dogs & cats do not have any real guidelines or anything controlling them like the FDA. It’s absolutely heart wrenching and horrifying.

      There’s a few different types of cat foods that are carcinogenic and cause multiple types of cancer.

      Fuck, the damn kitty litter can make anyone sick by breathing air around it. Gets in the lungs.

      Hartz is by far the worst. We gave it to my childhood cat, little cloud, and he became lethargic and stopped eating. Eventually he couldn’t swallow anymore because the damn flea “medicine” eroded it like acid when he cleaned himself.
      It changed his mind too. He couldn’t recognize us anymore, and began hissing at us and constantly meowing all day like he didn’t understand where he was.

      He died choking on fluid in his lungs because the hartz flea acid had slowly but surely dripped from his esophagus into his lungs and eroded them too.

    11. It could very well build up in your dogs system and lead to cancer.
      Or it could trigger neurological issues that become evident later.
      I would not touch anything by Hartz.

    12. Toxins, chemicals, from the product can build up in your dogs system and lead to cancer…or do the same in brain tissue ..and thst can trigger neurological issues down the road.
      I could not touch anything from Hartz.
      Personally, Walmart angers me by selling that crap

    13. Some animals are fine but it’s few and far between between this stuff, after my cat started foaming at the mouth with harts I used scentry for months I’m hard pressed for money. No negative effects after my incident I keep an eye on them after giving any meds.

    14. I used this product and had to rush my dog to the vet. He was put on high doses of steroids with NO GUARANTEE it would help him! While I was there, a dog was just put to sleep because of these toxic products. And what pisses me off is when I called the company the a-holes new it and actually didn’t care. They said it was up to the consumer to read the labels. SO WHY WOULD YOU WANT TO PUT THIS ON YOUR PET? Mine is family

    15. My dog got sick from this. He is a 3 year old healthy dog, and twice now within a day of eating the Chicken version of their chews he got violently ill. Throwing up and shaking.

  2. Frontline may be safer than Hartz, but it still has the potential to cause similar adverse effects. Frontline claims that it does not get into the bloodstream, but that is not true. Pets with skin problems, such as flea allergy dermatitis, are even more at risk of Frontline getting into their bloodstream, which increases the potential for adverse reactions.

    The Australian government recently completed a review of Frontline due to numerous reports of adverse incidents:

    They are recommending that additional warnings be put on the Frontline label, including not applying it to ‘non-healthy’ skin.

    1. Very true. All pesticide based products are dangerous and damaging t organs mainly to liver and kidney and cause neurological damage. Avoid them at all cost and instead use preventative natural safe products, such as Diatomaceous earth (make sure its FOOD GRADE) or diluted safe for pets essential oils as repellants. Buy Mercola safe products

  3. WHY IS THIS HARTZ product (s) still on the market– I just want to shout out to everyone – DO NOT USE ANY OF THESE PRODUCTS! Our 7 yr old healthy dog had- and is still having a horrible reaction to the flea and tick drops –he scratched until he bled – his skin was raw and he has been miserable for over a week now -how much longer before they are healthy and back to normal??- thanks to your website – we’ve been rinsing him with warm water every day and it has helped -no infection that we noticed and the vet was livid over the reaction…our poor dog has ben whining and just not himself – i feel horrible putting this on him to keep off ticks when we went to the psrk – I’d rather risked having ticks!Please keep us informed – should we take pictures to send to hartz?? We are so angry – they are so irresponsible to not do a massive recall and investigate this!

    1. Wash it off..

      Dont just rinse!
      ALL of it.. more than once. If you already did this.. try some arnica cream from.walgreens for pain. Its all naturl and wont hurt him.

      Rinse for VERY long periods following the washing.. try to keep water cool luke since the chemicals cause burning sensation (you want to avoid water tol warm or even normally warm water).. until the skin has cleared.. and no more sores remain wash w/ a gentle solution w dawn detergent and get everywhere that product went.

      Best of luck

  4. I used hartz flea and tick on both my small dogs. One of them was just so hyper after the use. It was strange, it was a dip. I’m afraid to use it again.

  5. I completely agree with you (to the first comment on here) I have been using this product for quite some time on my dog and have never had any bad side affects happen to him whatsoever…so I am just as confused as you as to why there are so many bad complaints- and if Hartz has such a bad rep, why do stores continue to sell their products???

    1. Stores sell for the money. Don’t care what Happens to our poor fur baby’s…… Poor baby’s! Should be used on the FDA that approved it to be used on cats.

  6. There are adverse side effects with any kind of medication, shampoo, or ANYTHING people! C’mon. Humans have side effects with their medications too. Including death. So should we stop taking medicine too? This is ridiculous.. Just because YOUR dog had a bad reaction doesn’t mean MINE will. We’ve used it for years with no problem on dogs AND cats.

    1. Wash it off..

      Dont just rinse!
      ALL of it.. more than once. If you already did this.. try some arnica cream from.walgreens for pain. Its all naturl and wont hurt him.

      Rinse for VERY long periods following the washing.. try to keep water cool luke since the chemicals cause burning sensation (you want to avoid water tol warm or even normally warm water).. until the skin has cleared.. and no more sores remain wash w/ a gentle solution w dawn detergent and get everywhere that product went.

      Best of luck

  7. Im in the vet school as well, and learning about this. And you
    are 100% correct. Stores want as much money as they can, so they don’t care if a product is harmful. They only recall products harmful to humans, which is unfair to animal owners.

    1. Stores sell for the money. Don’t care what Happens to our poor fur baby’s…… Poor baby’s! Should be used on the FDA that approved it to be used on cats. Think if you would not put on your skin, why would you think it is Ok to put on your fur baby? I feel so sorry for my poor cat that is now suffering .

  8. Thank you Angela :),

    And for those of you who posted that your pets haven’t gotten a bad reaction…well, it hasn’t happened yet. Before I began studying Veterinary Medicine, I used Hartz flea collar on my dog..first time, he was fine. 2nd time, months later, he got blisters all over his neck, became lethargic, began vomitting, and having diahrea.
    Just because it hasn’t means it hasn’t happened yet. My vet teacher stressed that just because it hasn’t happened yet, it is only a matter of time before it does happen.
    Think about it..would you put pesticides all over your skin?
    When I used it, my hands burned just from touching what makes you think it’s okay to put something unsafe on human skin, to put on your pets skin?
    And like Angela said, they only usually recall products that are harmful to humans. Pets are seen,by law, as “property and luxury items”.
    Go to your vet and get the appropriate medication. Like I said before, don’t use Hartz. Stick to Frontline, Advantix, or Revolution. All medication has a risk of bad side effects, just like human medication (in response to hamishdad). Animals with flea allergy dermatitis should be seen by the veterinarean first.
    Always see your vet first, or get professional advice.

  9. Sysy, they do have recalls on pet products.. Especially food. For someone in the medical field, I would think you would do your research. Also, I’ve used Harts on my dogs for YEARS. If they haven’t had a bad reaction yet, I doubt they are going to. Nothing has ever burned my hands.

  10. I too have had horrific effects on my cats and dog with Hartz products. We contacted our vet over the weekend when we discovered our newborn kittens had fleas- the fleas were irradicated from our home, but unfortunately the person who brought them to us originally came to visit and they’re back. We were advised to bathe mom and babies with Dawn and use a flea comb. Like magic, the fleas died on contact and they are completely flea-free this morning. We also spread food-grade diatomatous earth on the carpets, as this is an edible organic compound. So far, so good. Now I have 4 other adults, 1 older kitten, and 1 elderly dog to bathe. Dawn is an amazing product and extremely effective so far. We purchased the dye-free, hypoallergenic formula which has a very mild scent. I’ll keep you posted.

  11. @ anonymous- Your’re chicken to give your name? Sad. I hope you NEVER have to go through what any of us have experienced because it is absolutely heartbreaking. Maybe you’re one of the very lucky ones. Maybe you’re just a pet owner and NOT a per lover. Our pets are like children for a lot of us, especially those who cannot conceive so watch it with the insensitive comments. Oh, and FYI- I too used Hartz in the past without any issues at all. I spoke with a fantastic woman from the EPA and there is a study going on nation-wide to find out WHY this is happening en masse this year. She told me this is the worst year so far with injury from Hartz products. Do YOUR OWN research before you make a fool of yourself again. No wonder you remain anonymous.

    1. Every one has their own opinion, I’ve used HARTZ products for quite awhile now and this is the first I’m hearing about all this fuckery. Sure, a lot of dogs have had a reaction to it but many probably weren’t paying attention to their animal as they arent going to sit there for 24 hours to watch what the animal does. While you’re sleeping or away you’re pet could be licking/chewing at their coat which they would be ingesting pesticides which is what would cause illnesses/seizures etc. After using animal pest removing liquids you should be making sure youre animal cannot chew or have contact at the areas that pesticides have been placed. I always use cones for the first 24 hours after a flea bath or applying drops. I constantly look through my dogs coat with a comb to see if her skin is having reactions and I’ve never experienced problems before. I’ve been using this product for a little over 3 years. My dog is a 8 year old bridle bullmastiff mixed with pressa canario. She is an elder and never once had a reaction to HARTZ products. I go between HARTZ and ZODIAC. Never had an issue with either of them.

  12. I’ve been using Hartz products for about 13 years now. 0 deaths of my animals. I don’t treat my animals for ticks or fleas with medication. It’s to easy to take the time to care for them without medicines. I use dewormer on my puppies each time our bitch has a litter. So far 17 puppies and 0 deaths. As for the cat side, If your cat weighs less then 2 pounds when using dewormer then it serves you right it dies. Like any medicine, if you fail to follow the instruction then you reap the consequences. In the end, if you were to lazy to take them to the vet because it was cheaper then that’s on you not Hartz, if you don’t know what is what with worms then don’t try to play vet.

    -23 years Veterinarian. I would never recommend someone try diagnose worms. I would always tell people to go with frontline if they need to take the easy way out of tick/flea removal.

  13. I used the flea drops and my lovely, friendly, happy, cal cat started running around and hiding, she had no appetite, her fur turned spiky and oiled and she was very unhappy. After looking it up, I quickly realized that she could be hurt even further by this and washed her with a wet soapy washcloth (followed by a dry one) and now she’s her friendly self again! She’s even eating properly, and seems happier, (though the damn stuff didn’t even get rid of the fleas, as she’s still itching) I wouldn’t trust his toxic goo for use on any of my pets ever again, and I suggest you upgrade, even if it means you have to downsize from salmon to tuna for a while. 🙂

  14. i used half a tube of hartz ultra gaurd flea drops on my 1 yr. old chihuhua today at 330 and when i got home from work i noticed she was being really strange. she is really wobbley her head keeps wobbling and she cant sit up and her eyes are all squitting and her ears are layed back. i gave her a bath with dawn soap and she is hust lifeless .now all i can do is keep watching her and pray she will still be here with me tomorrow. she is my baby i dont know what i will do if this kills her. please god i am begging you please dont let her die please

  15. To the few who use and think it is safe…ask your vet. Any reputable vet will tell you NEVER use Hartz. Your idiots who are just pet owners and not pet lovers especially the breeder.

  16. Omg my dog had 2 seizures just 3 days after putting a flea collar on him.. I don’t know why this products are still on the market. Wish I would had seen this website sooner. . Animal murders that’s all you can call them…

  17. I applied Hartz spray on my healthy 8 yrs old dog and he passed away 6 days after…renal failure!! I don’t understand why those products are still on the shelves!!😡😡.

  18. I’ve used HARTZ products on my cat’s before, and didn’t have a problem. Only once my cat started going crazy. It might have been she had flea’s and that treatment made the fleas go crazy. She went bonkers after treatment, but survived. I just used it again, hope I didn’t make a mistake. I do know that vet’s are ridiculous in treating your pet’s. So they say over the counter don’t work good, come to us, and will charge you put the wadzoo for treatment of your pet’s when the economy of bad economics gets so bad a lot of these pet’s are left to fend for themselves. But of course pet doctors got ridiculous. I understand they haft to make a living. But to rip people off. Like my friend taken his sick little dog to the vet. Then they come back and told us it had septic. Then they came back and told us it died. Then they charged him $500 and they barely did anything. That’s a rip off, at first wanted to charge him thousands of dollars to do surgery. His dog was apparently gonna die anyways. Bunch of crap. They don’t care about your damn pet, they care more about $$$$$$$$$.

    1. As someone that was a vet tech, and no longer is, I do apologize for that situation. The truth is, vets are a business, but they actually make very little money. Since humans have insurance, you dont notice the unbelievably high fees. People typically do not buy insurance for their pets and insurance for pets is not the best, so fees seem much higher than they really are. They are a fraction of the cost of human medicine. Vets and techs make very little money. Vets might spend 500k on school and only make 60-90k. Thats even pushing it. To be a vet or tech, you really have to love it. Theres a reason why the suicide rate is so high (constant blame for pets death, consistant debt, euthanasia, ect). Over the counter pet medications and products are NOT regulated like human medications. Many are unsafe and ineffective (like hartz!!). Products sold through vets are more so proven safe and effective. We only recommend these products to keep your pet safe. There is always going to be an inflation of costs, but thats standard. For example, when my grandmother passed, we received a $2000 charge from the funeral home simply because we chose them. EVERYTHING ELSE had its own charge (and i mean every last thing). Its the only way they will stay afloat. This is why vets might charge fees such as a physical exam fee and other fees that dont seem “fair”. They may have done a lot more in the back then you know. You might argue that they should have warned you, but when its an emergency, you have to make calls quick.

    2. Um wow. You don’t have to go to the vet to get a decent flea and tick treatment. It’s called advantage or Frontline. Yes it costs a bit more but is your animal worth it? If not you may as well just not own animals because yes they can get expensive and if a person isn’t prepared for that they shouldn’t own one to begin with.

  19. Im a former vet tech. We had multiple animals come in seizuring and near dead after applying hartz. Recently, I advised my coworker not to use it. She used it anyway (since it was cheap) and her cat died within a day. Many people argue that they have used it without problem. Not ALL animals will react this badly, but the risk is so high and the product is so ineffective that it is useless to use. Also, ALL flea shampoos are dangerous and flea collars are ineffective. Please use advantage or frontline (dont let them ingest it) or get something like revolution from your vet.

  20. Cause the stores get paid for selling their products, everyone should start a petion on harz taking their products out of the stores and off the product line

  21. I’m Donalyn I have 4 cats I put the hartz ultra guard flea collar on them and Midnight one of the two kittens who will be a year on the 19th had open sores and lost all her fur we didn’t think anything of it until she kept getting open wounds now her mother Mittens became very sensitive the grains in the cat food but her coordination is way out of wack she keeps falling and a guy in California used the Hartz drops and three days later signs of issues he took his dog to the vet and the vet said it had to do with the hartz drops his dog Duffy died at the vet so he called the hartz company their denying that their responsible

    1. Cats aren’t supposed to eat grains. Only real meat/fish, and some added vitamins. Please stop giving Mittens and the rest of your cats grains.

  22. We applied the hart’s product to our cat and he has a huge patch of fur missing with a bloody irritation on his neck, he vomited and his breathing is weird. We used dish soap to take as much of the product off and applied cream to help with the irritation. Now we just hope that he will be fine. He has been meowing a lot during the night which is loud. He has been drinking a lot of water since we gave him the treatment. He is nearly 10 years old and we aren’t ready to say goodbye to our little man. He practically a watch dog in our house as he guards the house and when someone ring the doorbell he runs to the front door window.

    1. I had a cat that used to run to the doorbell as well or let me know that’s why he was here and start growling. My cat was so infested with fleas I wish I read this before I bought the stupid stuff because it killed my cat I just put him to sleep yesterday. He was so messed up neurologically was disgusting.

  23. I cant believe that 9 years later, this is still happening. My heart goes out to all who have lost or suffered. Those of you who have not had issues, you are the lucky ones and I truly hope you never do, as none deserve to go through this. For the sake of your pets, I urge you consider other options.

  24. I lost my baby girl several years ago after using this product. I did not know it would harm her and naively believed it wouldn’t be sold if it was known to kill animals. As my vet later explained “Medicine for animals are not highly regulated. Think about how many medicines pharmaceutical companies put out there that are killing people. How much do you think they are caring about pets dying especially when they are making so much money off the product?”
    It’s enraging and disgusting.

  25. Well not everyone can afford to buy Frontline Plus, Pet Armour,Advange,Advantax, Seresto Flea & Tick Collar,Capstar,and other oral medicines it’s just not possible for some. Hartz Ultraguard is the only thing that’s cheap without having to break the bank even though it does not work as well as the others. Never really had any health problems with using this product on my pets. I think the problem is people use the medicine wrong either the wrong dose size or on the wrong species which would cause death.

    1. Well then a person Shouldn’t own a pet. We have 7 cats and I would NEVER put this hartz crap on them to save a buck. I mean think about it. You can go to Walmart and buy this garbage for 7 bucks or so for 3 months for 1 cat. Why do you think that is? It’s because it’s crap and they know it is and is not effective anyway. You think everyone who lost a pet due to this product used it incorrectly? Doubt it. This has been a huge problem for many many years. If you own an animal you need to be prepared to spend money on them if they get worms or fleas or any kind of issue. If someone can’t care for their animals properly they SHOULDN’T have one. Just like you shouldn’t have kids if you can’t feed and care for them without going on welfare. There is a difference in a pet owner and a pet lover. I love my animals and they are part of the family and I would NEVER cheap out on a product like this that could potentially kill any of my babies. I’m not saying everyone that has given their animals this crap don’t love them, they are just uneducated. It’s the ones that know hartz track record and the lawsuits and ALL the animals that have died and still continue to use it just to save a buck.

    2. I agree with Chris. If you don’t have the funds, DON’T GET A PET. I don’t care what your excuse is. Your pets are not just a toy, they are living, breathing creatures who rely on your for their health and safety. Shame on you for giving your pets mediocre and dangerous medicine just because you can’t afford a couple bucks more on something that won’t legit kill them. Stop having pets.

    3. The bottle literally says it contains pesticides that can be harmful to your pet. I understand some people can’t afford it, but you shouldn’t have a pet if you can’t afford to give it proper care. People don’t understand that you have to consider vet bills, shots, unforeseen circumstances, and flea/tick/heart worm medicine which can run you $80+/mo. Research is key and any research on Hartz tells you they are crap

  26. Ok so I have 2 cats and I just medicated them a few days ago and I say on one of my kitties a small bald spot where the medication was aplied and then I looked a little closer and saw about an inch and a half in diameter scabbing and red spots and after reading up on hertz products I’m starting to worry, I just rinsed out her fur for about 10 mind and decided to give her a bath. She has been acting completely normal aside from what looks almost like chemical burns. Do u think she is in the clear? Is she going to be ok? Should I worry or am I over reacting? I have used hurts on her before and she has never had a reaction like this before.

  27. Maybe you should stop and think for a moment, Chris? Life happens to people! Unfortunately some just do not have the same choices and or knowledge in front of them all of the time; like you apparently do. From reading your comment, you seem to know it all and have every resource available at you’re whim. Do you really believe anyone would knowingly put their animals wellbeing at risk to save a dollar. What tells someone standing in Walmart as in your example, they should or shouldn’t purchase one brand over another? They all have similar claims. Some of the active ingredients are the same, albeit usually in different percentages, and the typical pet owner doesn’t know why or how they work. Price doesn’t indicate the risk of serious injury or death of an animal despite what you may think. What tells someone that $7 or $50 or more is the correct price for ridding pets of fleas and other critters? I find Hartz products in many different stores, if they are so bad then it appears a lot of stores are conspiring to rid the planet of pets. Until seeing this site, I haven’t ever heard of the “Hartz track record” as you put it.

    1. “Life happens to people!” And your pet should be sacrificed just because you decided to get the cheapest (and most dangerous) medicine at Walmart? Save your excuses. If you can’t pay for the well-being of a LIVING, BREATHING CREATURE, then guess what? Don’t have one. Simple as that. I’m sure they’d rather live with another family rather than be treated as a toy just because their owners want to save a buck.

  28. Is everyone missing the point here? The illnesses are caused mainly by ingesting the product from their coats,
    If you actually follow the directions, it tells you precisely the one spot to apply so ingestion is impossible.

  29. My wife applied flea drops to all 7 of our dogs. 2 of the puppies are now ill. Throwing up, diarrhea. We are treating them with pedialyte and are under a strict watch! As soon as we notice they are keeping the fluids down we’ll start force feeding blended boiled chicken and rice

  30. i just used haertz on my golden he is having a bad reaction heavy panting and does not want to move off his bed he seems dissoriented never use this product again

  31. I used Hartz anti flea and tick drops on my 7 lb chihuahua about 3 years ago and she had these crazy symptoms of falling over shaking and didn’t eat or drink anything for days I didn’t know what was happening just thought it was her, I used the product about two more time after that and same thing happened my best friend is a assistant veterinarian so I explains what was going on and she specifically told me in her class they spoked about how bad that product was and they still don’t understand why the company is still running if they have cases filling law suits against them, so anyway I stopped using the product immediately. Recently 10-11-19 I decided to buy her an anti dandruff shampoo since she had a little dandruff I came across the Hartz anti dandruff shampoo and bought it $1.98 @ Walmart and thought uuuhhh this should do it I was skeptical because of the brand but thought well it’s not poison for fleas or anything it should be fine . After bathing her about 1 hr later the symptoms started she was crying out in pain she couldn’t walk omg it was the god dam shampoo !!! Do not ! Do not buy any of there products if you do and nothing is happening to yours then think about the business your helping out the animals they have killed and look at my little chihuahua fighting these crazy symptoms and everything for a stupid shampoo, I felt so guilty but she’s still alive and I’m hoping for the best

  32. I completely stopped ALL flea treatments.  All of them are potentially harmful to our pets.  I bathe my dog every 2 weeks (or 3 weeks preferably, to maintain natural skin oils). I am currently using baby shampoo but am NOT reccommending this to all: do your own research on natural shampoos there is a world of information on the internet. Quickly lather around neck & ears & rectum 1st, to prevent fleas from hiding.  Leave pet lathered all over for about 5 minutes & fleas die. YOU DO NOT NEED PESTICIDES to kill fleas…just soapy water!!!

    Coconut oil rubbed into your pet’s fur/skin repels & kills fleas. You can also add it to your pet’s food. They love the smell & the taste (buy virgin).

    I routinely use a flea comb dipped in warm, soapy water (a moisturizing liquid hand soap), daily or after a walk.  After a few days of the flea combing, the fleas are not even attracted to him. The soap residue on his fur repels them.

    Additionally, I place baby blankets over all his favorite resting spots which I launder weekly along with our own bedding. I vaccum weekly & empty vaccumed dust into closed trash can outside or into soapy water bucket which I discard outside.
    Because my pup rests under our bed on carpet, I spray that area with ALL NATURAL flea spray: ‘Wondercide’ or ‘Vets Best’ as a precaution. Beware: not all products that say ALL NATURAL are safe.

    He is no longer even bringing one single flea into the house. He is flea free & safe.  I treated my pets with topical & internal flea treatments for years at the recommendation of my  Vets without EVER being warned of possible adverse reactions…so they no longer have my unquestionable trust. YOU need to do YOUR OWN RESEARCH & be your own pet’s advocate.

    I also no longer feed my dog any commercial dog foods (but this requires indept research on your part to make sure your dog is getting all of the nutrients, vitamins/minerals he needs). You can look online for all of the numerous recalls.

    Also, research vaccinations. We are over vaccinating our pets & weakening their immune systems.

    Hollistic is really the way to go. Educate yourself & you will not only have a healthy pet, but peace of mind! 

  33. My son and daughter-in-law used this product on their cats and one of them died today 1/3/2020. The cat was perfectly fine a couple of days ago. She had a seizure unfortunately, poor Nina. She will be missed.

  34. Why are u attacking someone for trying to warn people.I know teachers that misspell while typing.shes a vet not a dictionary.i just wish i had been warned.i went 2days thinkin my dog had the flu.There is plenty of proof.they have done bloodwork on many of the affected animals and vets do warn not to use they said,its hit and miss.i bathed 2 beagles .nothing happened to one but the other almost died.shaking lathargic wouldnt eat or walk and ran fever for 2days.i also have used hartz on my pets for a lifetime.i still cant believe this is happening & without consequence.

  35. When I first saw a post on Facebook about Hartz products harming animals, I was skeptical. I have used the shampoo on my dogs before and nothing ever happened. Until a few days ago, I gave my 2 yr old Doberman a bath with this product and everything seemed fine. He was playing in the backyard and then all of a sudden he collapsed on the floor. At first I thought he was just rolling around trying to get dirty again like he usually did after a bath, but as I got closer to him he was shaking and his eyes rolled back and he howled as if he was in pain, and within seconds he died. My poor baby died within an hour of bathing him with this Shampoo. Please don’t risk your pets using these products thinking it won’t happen to you, that was my mistake. Giving the shampoo the benefit of the doubt that it wouldn’t happen to me.

  36. I had been using this shampoo for my pup and he became lethargic, he was committing, he had diarrhea and severe abdominal pain to the point of immobilization. I do not know if the shampoo was the cause but I took him to a vet and they couldn’t figure out what the issue was. Maybe it was Hartz.

  37. I’d just like to say, they do have a warning on their products, which is why they won’t get shut down. It says on the back of their products that you should use caution when using their products on domestic animals. As with all pet care, you should ALWAYS contact your vet first. I haven’t met a single DVM that recommends Hartz, so..

  38. I think pet owners can still use hartz products. They don’t have to use flea meds or shampoo. There are still some good products to use. For example I use the hartz cat litter. It doesn’t do anything to my cats.

  39. I used it a few times and did understand why my dog was getting sick but he has developed alot of the symptoms people describe I am lucky I figured it out before I killed my dog.

    1. I had 4 cats, all siblings, all only a year and a half old. I was never been much of a cat person, but their mom, Buffy, was this skinny, little, starving & scared but adorable black kitten, a stray my kids found shaking & hiding in our backyard. We took her in and she turned out to be the coolest –she was so cute & sweet & agile & tough & graceful… we had nothing but love for her. When her litter of 4 was born, we kept most of them for a very long time.

      One of the kittens was named Steve; he was an all black male cat with piercing green eyes (who looked STRIKINGLY like his mother, Buffy — but Stevie turned out to be HUGE & thuddy, not the impressive gymnast that his mother was, but super lovable he was) and he quickly stole my heart. He’d wrap himself around my neck like a snake and sleep there… he’d bite like a dog a bit when we played… there was something about him & I just fell in love with him; he was Mr. Handsome. He grew to be qyite a big guy — the biggest of litter, BY FAR! And he definitely announced his dominance… he could be a bit of a bully sometimes 😮 …but he had swag😏). I ended up being HIS person… and he ended up being my baby. The other cats somewhat divided up and slept in my kids’ rooms; Stevie Weavie slept in my room. He was my buddy and was super sweet with me. He could be a jerk sometimes toward others, occasionally toward me even, but somehow I even sometimes found that side of him charming, too… blinded in love, I guess?!

      Three months ago, we ATTEMPTED to treat a flea infestation with Hart products (yep… from Walmart). First-timer here, regarding flea treatment. I sprayed my bedroom and over the course of the weekend, my Steve (the ONLY cat who slept on MY bed… the ONLY of the FOUR cats who had a problem… reasoning skills can lead one to infer that was NOT coincidence) got lethargic, lost his appetite, became a bit wobbly, would only drink water if it was brought to him, for the first and only time ever -he rejected a treat… then rapidly progressed to walking wobbly… he became unable to jump or land where he aimed, got feverish, soiled himself, and stopped drinking altogether — he was dying.

      The emergency animal hospital said he was so ill… too ill for a positive prognosis; they advised euthanasia. The vet said even if we attempted a course of treatment (at $1000-1500 PER DAY… which could ONLY be paid upfront, at least on a daily basis, in order for him to be admitted) …he’d require at least 5-7 days there… and because he was so very sick, even with all that, he’d only “maybe have a 50% chance of making it” AND even if he survived, she couldn’t speak to the quality of life he’d have if he couldn’t
      make enough of a recovery (hence the mortifying recommendation she’d made). I don’t have that kind of money laying around… and i was told he would likelybdie that night if we didn’t opt with euthanasia. I devastedly heartbroken as this cat LOVED DEARLY was given pain meds & put to sleep as i cradled him in my arma, sobbing as my YEAR AND A HALF OLD BABY BOY CAT had to prematurely and permanently drift away. I am crying now just recalling it. I will never want another cat again. I’m done. Never want to feel that again. Traumatized and heartbroken and done.

      Again… i was not much of a cat person until my love Stevie came along, so this is pretty foreign territory to me. When my husband told me he thought it could’ve been the Hartz flea stuff, I scoffed it off… “NO!!,” I said. “They wouldn’t sell flea stuff for animals thatbcould kill the animals THAT easily!! That’s ABSURD. If a product had the potential capacity for that level.of harm, it would HAVE to be prominently shown –or even printed ANYWHERE!– on the label!”
      Right?? I mean… you’d THINK, wouldn’t you?! Wouldn’t it be grossly negligible, wouldn’t it be CRIMINAL, to fail to do so?? I mean, we have laws that protect us (and our beloved pets) from shit like that! ….OR…DO…WE?

      With just a tad bit of research (and to my horror), I read/learned about a toxic chemical (particularly for cats) present in some flea “treatment” products STILL FREAKING SOMEHOW BEING SOLD! What?!?!?! How?!?!

      One comment asserted that anecdotal evidence is baseless and that this is all anecdotal. It IS a reasonable conclusion to raise an eyebrow and determine that something is likely wrong here (and then dig deeper to see if it confirms or not) when a similar story keeps repeating… and a similar end keeps repeating… over & over & over. Um, pattern?? Cause + Effect = an umdeniable element of Logic. To declare, and with such conviction in one’s cynicism, that everyone is here is foolish, to propose that everyone is looking for someone to blame, to presumptuously suggest that these anecdotes are probably written by corporate trolls cleverly seeking to smear their competition… ew.

      I rebutt: such blind, skeptical rhetoric, such a completely dismissive attitude, such inability to even entertain the possibility of any truth outside of one’s own lens… SUCH accusatory, pompous righteousness exudes the very things it supposedly looks down upon and claims superiority over–> it oozes a limited mentality, flings around unbacked assertions, presumptuously attacks strangers, and overall lacks objectivity (and lacks sensitiviity. Whether you wear the hat of the gullible young fool who believes it all or you wear the hat of the grumpy old cynic, a lack of objectivity… a lack of the ability to consider valid, legitimate merits on the other side… well, it is what it is.

      1. I’m heartbroken, but need no one to blame. I did NOT want this to be true… because it makes ME feel like I killed my own cat by buying & spraying the shit in my home! 2. Not “just” anecdotes… Research the chemical permethrin (I’m not spelling it correctly bc I can’t access my clipboard, but it is something like that & it WILL pop up in a search engine when linked to “flea sprays” …read about the toxicity level (scientically stated, not anecdotally!) It is there… it’s not an opinion… it’s not an anecdote; it is a fact and it is very clearly indicated by many reliable sources. 3. I’m not a corporate troll… totally real… and have an anecdote under one arm AND some facts under the other (if you are struggling to see past the cynicism and need confirmation that I’m not a corporation posing as a Hartz victim, feel free to email me …if ya have the gall to actually risk being wrong: [email protected])

      As far as the blowhard comments about how people are using the product incorrectly, thus causing these incidents:
      If that is a thing, if not perfectly following directions is a thing that could lead to anemic reactions and organ failure and seizures and neurological damage and death… if/when any straying from the directions has the potential to inflict THAT kind of damage on a pet… DUDE–> IT SHOULD BE PROMINENTLY WRITTEN ON THE LABEL!!

      Congrats to those whose cats didn’t get hurt, but dont be a condescending jerk toward people who lost their animals just because you have been blessed not to have suffered the same fate. Have a heart. Please. We are mourning.

      And while Walmart is a cheap, deplorable company in general, a store I’m far, far from fond of, THAT doesnt mean people deserve dead pets if they buy flea spray there. NEVER in a million years would I imagine they’d be selling a flea spray that EVEN CAN be **DEADLY** to the very animals who brought in the fleas & are suffering from their parasitic ways… the very animals we love & are buying this stuff for. I’m so heartbroken & angry. (I mean, excuse the language, but I’m reduced here to… –> WTF?!! WTFF?!!
      it says it all really.) How is this possible/legal????!

      NO outstandingly noticeable label (if any) to inform consumers regarding the potentially fatal (& apparently entirely too easily possibility of animals inadvertently ingensting the chemicals) …when a product contains a level of toxicity that may result in possible DEATH… how is it okay to not make that crystal clear?! How??! I just don’t understand… I’m at a loss on the lack of ethics demonstrated by Hartz, a company that has fielded complaint after complaint and faces multiple lawsuits, but still does nothing to change the pain its negligence is causing! Disgusting. The labeling of their products should be far more transparent. Had I knkwn the risk I was taking in using that crap…. NEVER WOULD HAVE GAMBLED MY CAT’S LIFE.

      R.I.P. Stevie, my handsome boy…. miss you, buddy 💔

  40. I bought this and my kitty had a bad reaction from it on her neck is raw and missing all her fur I’m having to give her Benadryl to control the reaction and the itching wtf they need to quit selling this shit

  41. I’m just seeing all this now. I recently had to put down my dog because he refused to eat and became to skinny and ill. I used the Hart’s senior shampoo not even a month prior to his passing

  42. My daughters dog went into hard seizures after having SENTRY FLEA product put on her. Her seizures were so bad that the ER doctor could not get them stopped there for we had to put her down a beautiful 1 yr old dog. This product is related to Hartz product who sold it under the name Sentry.,This product is a dog a d cat killer and should not be on the shelf. DON’T BUY IT……….

Leave a Reply

Your email address will not be published. Required fields are marked *