I had a tailless rat born to my male dumbo and I am assuming top ear female. It is a female and the first fully tailless rat I have had so far. I had a female born over a year ago with half a tail, but she was mean. This girl is skittish, but not nippy at all. I am thinking of trying to breed her back to her dad. I don't know who her mother is because I have four females in that tub, two dumbo girls and two top ear girls. I think it is probably one of the top ear girls because the tailless has top ears too. Anyone ever had a tailless rat? Know anything about their genetics? I don't have a photo, but I am going to try to get some soon.