it depends on the type of hairless you have full nude they have no hair at all, they have the most problems with producing milk skin infections and kidney failure. then there are the patch work hairless they have curley whiskers like they have been singed and little patches of hair that grow in and fall out from time to time. the patch work make good breeders most of the time have only had 1 out of 10 not be able to produce milk.