Harts One Spot flea treatment killed my cat. It caused acute liver failure and it happend quickly. I had called the company and was told that it contained no pesticide, just give your cat a bath, I’m sorry she’s having a reaction. They took my personal information and told me that if I could get a refund if I sent the reciept and the leftover product. Why would I save a receipt, I didn’t know this was going to happen! The refund was the least of my worries. By the time I got her to the vet she was almost gone. I was told the best thing to do was end her suffering. A couple of days later the Harts Company called me back to see how my cat was doing. I told them she had to be put to sleep because of liver failure. The lady said that it had to have been going on for a long time. I told her she was healthy before using the product and hung up. I was furious!! I’ve warned all my friends & family. I wonder how many other beloved family pets have to die this way before something is done?