Hartz flea collar made my cat sick

I used Hartz flea collars on all 4 of my cats who are all under a year old. After about an hour of wearing the flea collars my cats began to act different. Usually my cats will eat anything you put in front of them, but all of a sudden they wouldn’t eat any of their treats or chicken I had for them. They were also acting very sluggish and lethargic. I assumed that they may just not be fond of having to wear collars. The next night one of my cats Darwin began crying and I had no idea why. I followed him into the bathroom where I saw him vomiting a weird yellowish green liquid that was sort of frothy and there was also a bit of diarrhea on the floor. I took the collars off each cat after this happened. But, now I’m really not sure what to do and I am not sure if my cat is going to be alright.  Darwin seems more relaxed now, he is laying down in the bathroom. Is there ANYTHING to fix this or am I too late?

7 thoughts on “Hartz flea collar made my cat sick”

  1. Oh no!! I’m sorry to hear about that! These collars are so dangerous! I’m almost doe with my schooling to get my vet tech degree, and there was this girl who used this product, and she said the next day she woke up with her cat yelping in pain and she saw that the collar inflamed her neck and the hair was missing and all you saw was her pink skin and flesh. 🙁 (And no the collar wasn’t on to tightly ) its a shame hart’z still makes their products

  2. I put a Harts cooler on my kitty, too. After a few days witnessing her lack of energy and appetite; I’be taken it off her. I feel like the worst pet parent in the world. The only reason I left it on so long; fear that the fleas were eating her alive. Now she is so not feeling well. Any suggestions?

  3. I just put on a hartz flea collar on my 5 month old kitten today , and it made him sick. He went from his normal active playful self to not doing anything, and dug and dug at his neck. He vomited once. I didn’t have it on more than a couple hours before I took it off. He is doing better now it’s off him. Horrible product. Will never get it again.

  4. I put a Hartz flea collar on my 8 year old cat last week. I’ve noticed her acting very differently. She’s crouched up and hid in a dark corner at the end of the hallway, hasn’t eaten, drank water or pottied in several days, she’s lost weight, doesn’t want to be bothered (when normally she’s a very loving baby and wants to be near (on) us all the time). She definitely doesn’t feel good at all!
    I just Googled this and saw all these negative comments about the Hartz products! 😮 I’ve taken the collar off her now, and I’m debating if I should take her to the vet or wait to see if she starts feeling better.

  5. My cat died today. 😭
    I feel like it has something to do with me putting that collar on her last week, because she was fine until then.

  6. Hello, I put a collar on my cat who is 8 yrs old last night and noticed that he has been in the dark closet for roughly 13 hrs now. I just removed it and am praying he will be ok. Is there anything else I can do?

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