It is supposed to be, the bulk of my fosters have been black and whites, maybe there are more of them born than other colours. I personally wouldn't have chosen to own some of the black and whites I have fostered, but there are some on here that are stunning and I would have!! I have a soft spot for pure blacks though (got 2 in the house at the moment, I am hoping the one available for rehoming doesnt' haev to wait too long).