my daughter in law has had two cats for seven years. recently she purchased hartz mountain flea control after applying the product the cats were licking each other to get it off. with in four days,she had seizures and a stroke and had to be put down ,a vet confirmed that this flea control product caused this. the other cat hads the same reaction after three weeks. she was washed down in an effort to remove the product.she also had to be put down. needless to say my 11 year old grandaughter was very upset and this product is not fda approved and should be taken off the market immediately, we hope everyone who reads this post will not use this product and stop the needless killing of our beloved pets. this product is still being used by hartz mountain thru greed or stupidity.