HI, I am new to keeping a large amount of rats and have a question about how I can tell who the mother of a litter is. I bought 20 Rats from a guy that was getting rid of his snake collection and a 5 level cage. So I had no intention of breeding them but they were all in the same cage. I got a couple more cages and went to separate some of them today and found 4 pinkies in one of the hides. There are 5 females in the bunch and I'm having a hard time determining which one is the mother. Is there an easy way to tell?