OK this is the 2nd liter the mother has had. I got the mother & father from a friend who didnt want the mice after they had babies(10), which were 4 weeks old by the time I got them, Now the mother had another 12 babies, which the babies and mother were put alone in there own tub, 2 days later 2 babies were gone, now its been a week and there are only 6 babies left, what do I do to not lose any more babies