I used to breed gerbils, my female had 6 babies, 3 females and 3 males. the males were seperated from the females at weening and the females all started to eat each other, their tails were bloody stumps, and they began eating feet.... out of 47 baby gerbils that this female had, these were the only 3 that did this and it wasn't her first nor her last litter. Needless to say I couldn't sell them and they were fed to a friends snake. But I was wondering what could have caused this? This wasn't the first mixes litter, and it wasn't the first of this size, does anyone know what could have happened?