I have two black ones too, as well as a calico "baby" (she is two now, but still looks like a kitten) - and one of the black boys is "Fritz"
. They are also indoor/outdoor, though I can't say if any one is more or less bothered by fleas than the others. I just got some DE a couple of weeks ago, and have rubbed it into the carpet; I don't know if it is helping, the little beasts don't go for me much. But DH isn't complaing as much, so maybe they have lessened.