Well My Cousin breeds rats for our ball pythons both his and mine and he had a hairless male then we got some hairless females to try to breed them and get hairless babies . so the hairless male was put in with two hairless girls and after a few weeks one had a litter of babies. i come over about every weekend to get food for my snakes and stuff. he showed me the babies and i was like cool. i knew they get a littel fuzz on them then they lose their hair. but it was diffrent every week i came back they were a little more big but still had their hair. so then after they gor weaned all of them had fur just like any other rat and we just fed them of but kept 2 girls and put them in the colony. so does any one know why this happed thank.