Well I raised mice as a kid to feed my snakes and I don't remember having a problem with babies being eaten. I decided to raise my own mice again. I checked on them today and one of my females looks smaller but there are no babies. I know they're not over croweded because they live in a mouse mansion. I have 1 male with 3 females in a 50 gallon aquarium with toys and all. I guess it's possible my female was never pregnant but I'm almost positive she was. What should I do?