Bad Reactions to Hartz Flea Drops for Cats

I applied the Hartz Advanced Care Flean Tick Drops for cats a few days ago to my four housecats. All four are not related and are different breeds and ages. I followed directions precisely and almost immediately starting seeing my cats acting strange. One in particular (my biggest cat) had the worst reaction. He started running around in a panicky state and then burrowing himself under the couch cushions and would not come out. I got online and started researching only to find out about the lawsuits and all the other horror stories. I washed it off as best i could from all four cats and watched. I am a lucky one. After about three days of some erratic behavior but no seizures or convulsions it appears my cats will be alright. As of now i have two cats with complete bald spots on the back of the neck where the drops were applied with redness.

I am so angry that this product is on the market! I have gotten busy writing The Hartz Mountain Corp, and every other store that sells these products. So far i have heard back from Hartz which actually stated and i quote “they had no reason to believe there would be an adverse reaction”. Can anyone believe that? After they have been going through lawsuits for years?

I wrote them back stating i couldnt believe they said that in their letter and we will see what they reply.

NOW THE GOOD NEWS! I went into my local Winn Dixie Grocery store where i purchased the product and told them my story and was SO pleased they immediately got a shopping cart and took all the hartz flea products off the shelves! It felt so good to DO something about this….im asking everyone to do the same. My daughter who lives in another state went into a local pet store who carried these products and did the same thing. THEY removed them! So it does work and if we can save any pets from this pain its worth it! So people dont just get mad…….get active!

I Poisoned my cat

I gave my 2 year old little cat the Hartz flea and tick drops (Phenothrin) in the morning. At the same time I gave my 10 year old cat the last dose of Revolution (Selamectin) flea and tick drops. I left the house for the day and when I returned that evening my 2 year old cat was experiencing hypersalivation and rapid breathing. She seemed uncomfortable and agitated. I thought she would overcome it so I let her be for a few hours and then started to worry when it continued. Meanwhile the 10 year old was fine. When I went on line I immmediately found a court case where a woman was sueing Hartz for damages and this site. I immediately washed my 2 year old in the sink in an effort to get all the medication off. She stopped the hypersalivation but is lethargic this morning and still is breathing fast. I will return the product to the store along with a copy of this web site to show that they should discontinue sales. I think she will be allright – should she see a vet?


These pictures are the most disturbing that I’ve ever seen. You have been forewarned.

Yes it is. Please see the attached recent photos of buddy taken on
7/26/03. My veterinarian has put her self on the line by writing hartz on
my behalf and I intend to do something about this produced being sold.

Sincerely Connie Stewart
—– Original Message —–
To: Sent: Friday, August 08, 2003 11:43 AM
Subject: Re: Feedback

Was this chemical burn due to a Hartz product?

Sender’s Name: Constance Stewart
Message: First I would like you to know that my e-mail is very spam
sensitive. I would like to email to you some photographs of my dog buddy
that I and my Veterinarian took of the 3rd degree cemical burns that buddy has
form his neck to his tail all along his back and about 6″ wide to the
bone. I have contacted Fox 6 news and they are in the process of
investigating the company on my behalf.


Connie Stewart

If your pet suffers from Hartz poisoning

Someone on the FelineOwnersAgainstHartz Yahoo group posted this very useful link about what to do if your pet suffers from Hartz poisoning.
It’s on a veterinary clinic site, and they also explain the effects that the toxins in Hartz products
have on companion animals and what to look for:

(Thanks to Val)

Almost lost my cat

Like everyone else, I was unaware of the danger of Hartz Advanced Care flea and tick drops. After following the directions precisely as the packaged label stated, I noted within a few hours that my beautiful calico cat was suffering from muscle tremors. She was rushed to the vet where she was diagnosed with pyrethrin toxicity (yes from the flea and tick drops poisoning her!!!) She had generalized muscle tremors, was mostly unresponsive, had an elevated temperature and heart rate. She required immediate bathing, IV Fluids for 1 and a half days as well as several dosages of methocarbamol, a muscle relaxant. She continues to be pretty out of it and lethargic even 3 days home from the hospital. When I spoke with the Hartz corporation they were nonchalant to say the least……..I am now working on getting my “Pumpkin” back to good health and on alerting all pet owners that I know. I think mass emails would do nicely.

My Vet thinks

A few days after applying Hartz flea drops on our cat, we found him acting stangely. First, he kinda hid outside and would’nt come in the house. A few housrs later he came in, but pretty much stayed in the same spot for hours and would’nt eat. After two days of not eating, he finally took some milk. Then we noticed his pupils were completely dialated,and were’nt reacting to light. We took him to the Vet where he was given a complete blood test, which showed nothing wrong. When I told the Vet he started acting stange after the drops, he said it may be the cause. We had to have him bathed by a professional groomer, and the Vet gave him several shots to counteract a possible reaction. After three days, the cat still has fully dialted pupils, but is eating and drinking normally.I have to take the cat back to the Vet in a few days.I found the empty vial of Hartz drops and plan to take them with me. If this is found to be the problem, I intend for Hartz to hear all about it!!

Hartz gets even lower…

I was in my local Sears Hardware Store on Tuesday to buy a sprinkler…I noticed the flea and tick medicine right next to them and thought I should get some for my dog and cat. I even looked at the packages to be sure they were “newer” and not old dusty stock. They were in bright shiny new packages. I went home and followed the directions for both pets… stripe on…. base of head to tail. It was a busy night and I didn’t realize that my cat had spent most of it hiding in the closet. The dog was fine. The next day, my cat, Dexter was having tremmors and leg flailings and was hiding. He was licking at his back. I washed his back with a wash cloth to see if that would stop him from licking. It didn’t. I looked on the back of the package and it only said something about redness and skin sensitivity. I washed him in the sink because he was still having the tremors. I called the vet and was told to take him into the emergency vet hospital. He was freaked out by being there but the tremors weren’t as bad. The vet said he was better than most and that it was a good thing I washed him. She told me to take him home and wash him again. I did. He looked bad still the next day. I went to a Petsmart vet and Dexter was placed on IV fluids and was given muscle relaxers. I had to leave him there and went back to Sears Hardware. I took about 40 mislabeled packages off of the shelf and gave them along with the EPA regulations to the manager. It turns out they just started carrying Hartz products 4 months ago!!!!! Hartz has stooped to an ALL TIME LOW!!! They knew they weren’t supposed to send out this product with the bad label after November and they did it anyway! I am so mad! I get to pick Dexter up in a half hour. Poor baby had to spend 2 days at the vet! After all that I’ve read, I feel lucky though. He still has some tremors and ticks, but hopefully they’ll go away. Sears, by the way, has been wonderful. They’ve contacted Hartz and are sending back the old packages and have spread the word to all branch stores. I’m contacting anyone who will listen. I guess Hartz thought they could get away with sending the old packages to a hardware store because people would think it was there for a long time. What jerks! Any suggestions?

What I’ve Seen

From the knowledge I’ve recieved working in the veterinary field, most flea & tick topicals should be used with caution on our pets. But, I have to say, I’m going on 5 years in this field and I’ve never seen one product alone cause sooo much harm and sometimes death as this product. When a person comes in with a pet with tremors and says the only thing that they have done different that day was apply a flea topical, they always look at us in amazement when we say, “Did you use Hartz by any chance?”. Please use the flea and tick control your vet recommends. Yes, I know it costs more, but from what I’ve seen, its worth every penny. I would never use Hartz on my 2 cats. I don’t know anyone in the vet hospital I work at that would either.


My cat Chloe almost died this past Sunday. I believe it was a direct result of us applying Hartz flea droplets a week ago. She could barely breath I had to take the poor thing to the emergency vet clinic where they drained her lungs, which in itself is a life threatening procedure. On Monday I took her to our regular vet who tested the vial of fluid drained out of her. She was also negative on every test they gave her for disease. The vet has come to the conclusion that she developed some type of infection or reaction which caused her lungs to fill up with fluid. I believe it was the Hartz because she showed no symtoms prior to the application of flea medication. If anyone’s pet has shown similar symptoms after being treated for fleas please contact me @ [email protected] Thank you in advance
Anne Tamel

Pretty All White Poodle Named Lil Girl Gets Ugly Black Spots

I’m searching for a current lawsuit against the Hartz company involving dogs. My beautiful all white poodle could of been a show dog before I used Hartz flea treatment on her. Within a few weeks of using the product she started getting two blackish brown spots in the exact spots I placed the treatment and they grew until now she has two horrible dark spots on her back. It even turned her skin the same color. I took her to the vet and he said that he has seen it many times from using those drops. I’m so happy that it did not cause her more damage although she throws up now and then now. If anyone knows of any suit I can join against this company for dogs, please email me at [email protected]. My name is Gina. Thank You!