I am so happy that I found this site. At the start of the summer, we had three cats. Sadly we had to put them to sleep because of old age and sickness. The youngest one was only 2 and he had just gotten sick. After the third one was gone, we went and got a kitten so my son could have one to play with. Then we realized that we had a bad flea infestation and I decided to go to the store and buy anything that would help our poor kitten. I bought the flea and tick medicine for cats yesterday and luckily found this site. I am going to take that medicine back and buy the stuff that I know is safe. I hope that Hartz gets taken off the shelve.