Im having great success breeding rats they are great mothers ,my mice on the other hand are bad my first mouse ate all her young,the others seem not progressing well & not even prego yet,was thinking of getting some ASF's because I have some proplem balls that are off feed,also I HAVE SOME LARGE CORNS that love crawler rats & eat jumbo mice with gusto.MICE suck I have tried everything to get them going this is my third attempt & going to give up on mice.also my rats grow so fast they get too big for my pythons I only have two weeks when they are the right size.