I tried Hartz flea shampoo on my cat back in 2003 and I noticed my cat very subtley twitching afterward. I rushed her to the vet immediately and when I was questioned what I used on her the first words out of their mouth were “was it a Hartz product” ? They told me they see bad cases all of the time and they would never recommend this product it was harmful to most animals. Luckily my sweet babycat survived otherwise I would’ve been suing the heck out of that company, I had her from the time I was 7 years old, now 29.
Don’t use Hartz please pass it on….