I have tried my way thru a lot of the flea drops on my vets shelf. They have all worked pretty well til Giz and Bubba have their first bath afterward. It's like it washes it all off. Have started using the Adams flea shampoo. Supposed to have a residual? We'll see. I know their spray works well but Bubba is 5 mos and probably too young for it. It's very easy here in TX for the fleas to get ahead of you. Seems to be a never ending fight. How much is this Capstar pill? and how long does it work? Best of luck everyone.