Recently I took back some rats from a friend of mine. She had 2 that I originally bred, a male dumbo agouti berk from a male dumbo beige hairless X female dumbo Russian blue self. And a beige top eared female from the same hairless male to a top eared russian blue. I also got 5 of their offspring, 1 female top eared beige hairless, and 4 males I fed off with dad.
So as it stands right now I have the original mom that I produced(beige top eared het dumbo het hairless), and her daughter(beige top eared hairless het dumbo)
The hairless girl had a litter 2 days ago, more than likely bred by her father than one of her brothers. She had 11 babies altogether, 1 born backwards and died shortly after, and a second was likely born dead(not there when she had it but it was still warm when i found it). Now I was scared to death that mom wasn't gonna be able to feed them since I've read everywhere that it's rare to have hairless females that lactate sufficiently to feed litters. Well this girl is feeding all 9 babies!! I watched them the first couple hours to make sure that "grandma" wasn't stepping in and taking care of them but she's absolutely not, it's all the hairless mom.
So how rare is it really to have hairless females raise up litters? I know it's early and things could still take a turn for the worse but I'm really excited that I have a hairless line that I'm going to be able to work with :D
BTW it appears I have 4 agoutis/blacks/blue and 5 beige babies judging by eye colour, still have to wait to be sure on colour/hair/ears though :(
Mom is also 100% NOT double rex, this is a hairless gene.