What I would do is a) make sure the cages are sealed. Check anywhere he can get in. b) Do you have a cat. If you do, let it do patrol. and c) get one of those plug ins that emmits high pitch buzzing into the wall. That got rid of my wild mouse infestation in a snap. I aqm sorry about your litters and bucks. One thing- he may have gotten your does pregnant.spazzy_sparx said:Well, I figured it out. It wasn't my females at all! I opened one of my cages yesterday and somehow a wild mouse got in. I have seen him before, but he never bothered my mice and I can't catch him! He is too frickin smart! He killed another dozen pups last night. I am super bummed. He also killed one of my prized bucks. ...This is ridiculous!! I am having a war with a mouse!