I used Hartz Flea and Tick Shampoo this past Monday and noticed that my dog’s (small 5lb chihuahua) itching got worse. By Tuesday night/Wednesday morning, his mouth began to swell. Swelling then moved to his eye and large bumps began to appear on his forehead. I immediately blamed the shampoo because that was the only new thing that was recently introduced to him. He’ll be 11 years old next month and has never had these symptoms before.
I bought benedryl and although it did reducing swelling, the bumps kept coming back and the itching was still there. I gave him another bath with his usual shampoo, hoping to remove all residue from the Hartz shampoo, but the symptoms were still there. Mild, but still there. Today (Thursday) I’ll be taking him to the vet. After reading how bad Hartz has been to many pets, I don’t want to risk finding a cure on my own. I’d rather let the vet take care of the situation ASAP.