I made the horrible mistake of putting the Hartz flea drops on two of my cats. Cali had the reaction to the drops first. I woke up one morning to her shaking. She wouldn’t drink anything or eat, some of the time she wouldn’t even sit down. She would just stand in one spot and shake. I thought that if I washed her the drops would be rinsed off of her. The next day I awoke to her having what I imagine to be a seizure. It only last for 10 seconds, but I was scared. When the seizure was over she wasn’t moving. I thought she may be dead. I walked over to her and she was still breathing. She got up like nothing had happened and she walked and started to drink some water for the first time in a few days. Right after Cali had a seizure I noticed that my other cat, Patchy, was starting to shake as well. Later the same evening the had his first seizure. His reaction to the drops were a lot worse. He wouldn’t move at all and I could hear him breathing from the next room. He had two seizures when we rushed him to the vet. In the car he had at least two more seizures. When we finally got him to the vet he had a fever of 106.5 degrees Fahrenheit. The vet said he would have to stay over night. They also said that Dawn dish soap will cut through the flea drops. He had to stay overnight and had an IV, but he came home the next day. It is two days later and both of my cats are doing fine.They are both back to normal. The vet saved my cats life. I would never have thought that Dawn dish soap is what they use to help get the flea drops off of the cats. I just want to say sorry for everyone that has lost a pet to Hartz flea drops.