Mouse eating tails off babies.

[toddnbecka]

Since there aren't any pet shops locally that sell live pinky, fuzzy, or hopper size mice I decided to start raising my own. Main issue was the baby carpet python, not taking f/t, so I had to drive 1.5 hours to get live feeders, not something I wanted to do weekly. Now the wee bugger takes f/t with no problem. but at least I'll have a good supply of pinks for the baby Okeetee and hoppers for the carpet on hand.
I started with 1m/3f in a 10 gallon tank. After a couple weeks the male mouse developed rolling disease and died, followed by one of the females about a week later. The 2 remaining females were pregnant before the male died, and both have now given birth. First litter was 12, now fuzzies 2nd litter of 9 just arrived. The 2nd female has apparently eaten the tails off the first female's entire litter of babies, and now done the same thing with her own. Before the 2nd litter was born I moved them into a plastic tote with more space than the 10 gallon tank, and added another hide box since the 2nd female wasn't sharing the hide with the first female and her babies.
I have another tote with 1m/3f I picked up at the last Hamburg show. One of those females dropped 6 babies yesterday, all 4 adults share one hide box, and none of the babies are tailless. Any idea what the problem is with the one female that seems to have a taste for meat?