Here's my two cents. Two Drops. I know I have seen it posted to use the cat/kitten amount. It was ten years ago the first time I had to use a flea control and at that time it was suggested only two drops of Advantage. I have followed that prescribed amount ever since and not had a flea problem despite other animals coming in from the yard. I have also used Frontline in the same amount. In using only a couple of drops I have not found that it needs to be applied more frequently. There you have my two cents - two drops, works on masters. -- Karen Young Ferret Affair [Posted in FML 6006]