My yorkie poo, Killer, started having seizures due to this flea and tick shampoo. He had them for over a year, I didn’t know he was having seizures, before I realizedit and took him to the vet. I looked up hartz shampoo and all the bad reviews and asked the vet about it. The vet tried to tell me that it wasn’t his shampoo. Thousands of dollars on tests and medicine over 6 years. He is now seizure free and we have not used that brand in 6 years. The amount of money and heartache this has caused is not okay and something needs to be done about it.