Huh, that would be a dilemma if you had a flea problem!!!!! LOL We don’t have a flea problem either so I’ll probably switch to what you’re using LOLThat's good that it's working there. I think my vet said the Advantix works for ticks but not fleas and the Frontline works for fleas but not ticks. I could be remembering wrong though.... Anyway, we don't have a flea problem up here so Advantix II/Provecta Advanced works for us.