I bought the Hartz flea and tick vials for my cat and got home and put one on the back of her neck like the directions said. Within 5 mins my cat was foaming at the mouth and was acting beyond weird. My little precious was pitiful. I called her vet immediatly who told me to wash her ASAP in dawn dish washing detergent and that they are seeing this all the time with the Hartz. She told me they see all kinds of sever reactions to the hartz. If I had only known. My Precious seems to be doing fine. This all happened today 9/29/10. She is just mad at me right now. This stuff is aweful.