Please contact a vet first and DO NOT USE the over the counter flea/tick drops. I lost 2 cats out of 4 in 24 hours due to the sergeants brand for cats. It made them all very ill with tremors, seizures, and alot of twitching. I almost lost them all but managed to et the last 2 to the vet in time. Very emotional 2 days. The other 2 just came home today and are doing fine. Anything we can do to get these products off the shelves? Hartz has a lawsuit against them for the same reasons. These products poison our pets and we don't even realize it until its too late. So please consult a vet first before you use anything including flea shampoo too.