Quote Originally Posted by frankykeno
Okay how big is this tub? You've got four large adult rats in there plus their litters and females getting rebred immediately after bearing young. It's really no surprise you're not getting a lot of success. Rats do not naturally turn on their own young (even the males) but if overcrowded, fighting for food or other resources in a confined area...it's going to happen.
This would have been my first question also. Make sure they are kept in a decent size enclosure.