Two weeks ago I put Hartz flea and tick drops on my healthy 13 year old Golden Retriever. The next day he started vomiting and stopped eating. I took him to our vet, who unfortunately hadn’t heard about any of these reactions. He sent us home with antibiotics and stomach medicine, but my dog just kept getting worse. I took him back to the vet, and he tried IV hydration and more medicine, still not knowing what was wrong. We scheduled an ultrasound. We were even thinking we would have to put him to sleep. If only I had seen this web site before now! I ran and scrubbed him with Dawn, but I don’t think he’s going to recover. My poor dog hasn’t eaten in almost two weeks, and he is so weak he can barely stand. I am so angry! Please get the word out about this horrible product.