one of my breeders started eating her litters recently too. apparently she does not like to have another female in with her at the time that she gives birth. twice in a row now she delivered at some point during the night and culled the entire litter before i even saw the babies. both times there was another pregnant female in with her. there are only a few spots of blood on the bedding and an obviously no longer pregnant female in the tub the next morning as evidence. maybe our females didn't like the other female that was with them or were stressed in some way by her presence? maybe the females they were with when they had litters before were different and didn't cause the stress?