I used this product on my 2 small dogs one 14 lbs and one 11 lbs. They both began scratching and rolling around on floor. I realized they were having an allergic reaction. I then bathed them both and gave them liquid benadryl. They both continued to be miserable overnight with my smaller dog whining when he moves. I bathed them again this morning with medicated shampoo and put Vesticort (which I got from the vet for dry itchy skin before) on them. They are both still miserable but it seemed to help a little. I wish that I had checked on the product online before I bought it. I usually use Frontline from the vet but hours at work have been cut so I was trying to save a little money. I will not do that again. Anyone reading this take warning this product ought to be banned!!!!