I’ve never used any Hartz product on my dog, a six-year-old, medium-sized mixed breed, before. She has had fleas in the past, once we used Frontline. I saw Hartz in Waldbaums and, being cheaper, I figured it was worth a try. I wish I had done my research first. After applying the drops exactly as directed, she began scratching and biting uncontrollably, particularly in one spot on her left rear. She was losing hair behind hear ears, near her shoulders, and under her collar. Within a few days, she managed to wear a quarter-sized hole in the spot that she was biting. It was pink and inflamed and kept getting bigger, so I took her to the vet. The doctor said she probably had a flea bite, had scratched it, and it was infected. But he couldn’t explain her hair loss. We got antibiotics and an inflammatory shot. The kicker is, as I was paying my bill, the receptionist asked if I wanted to purchase Frontline. I told her, no thanks, we did a flea treatment recently using Hartz. She and the other woman at the desk were like, “Oh my god, no, that stuff’s no good.” They didn’t explain further, but that made it all click – of course! This behavior had only started after the treatment, and she’s never done anything like this before. Now I’m stuck with $233 vet bill and a very unhappy dog. Luckily, the infection appears to be on the mend thanks to the antibiotics.

Very glad to have found this site so I know that I’m not alone. I’d love to be part of some sort of action or cause to stop this company from selling such obviously harmful products!

4 thoughts on “”

  1. What a horrible story! Prior to today, I’d never even heard of Hartz stuff since I’m not a pet owner. I’ve been looking for a cat to call my own, though, so I’m really glad this information is available. When I did some more searching on them, I found so much anti-Hartz material on the internet, including some really sad pictures and stories. With all this in mind, I’ll definitely be opting for Frontline Plus Flea and Tick Control, since nobody has reported any of these extremely adverse side effects for their products.

  2. I used Harts ultraguard pro flea and tick drops (over 5 pound cat) january 3 2010.. My very healthy,rambuntious and always entertaining tomcat lost his appetite for 3 or 4 days. Also very less active for that time(slept more). Activity was back to normal after that. Feb. 22th i refreshed his flea drops after seeing fleas..But only used half the tube. The side effects last 2 days. I am going to reseach if this is normal and can i use a half dose at a time

  3. I used these flea and tick drops on my dog Bailey, and a few days later I noticed a black greasy streak going down her back where we put the drops. Nothing weird happend to her skin, just her hair. Ive sprayed her with a hose a few times and it is still there? She is an outside dog, in AZ, 8 years old, and she eats catfood if this is any importance.

  4. hello i have a 8 week old kitten and i put hartz ultra guard plus for fleas and tick because i saw some fleas on her . my question to you is , is it harmless for cats if they lick it off of them ?

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