So about 3weeks ago i got a trio of mice, 1 male and 2 fems. The first fem gave birth to 8 bubs a few days ago, 1 of which disappeared, the rest are going well. The 2nd female gave birth over night but all the pinkies were dead when i found them this morning all mixed into the substrate, one was headless and other had chunks taken out of them. Any idea what would have caused that? They are well fed and watered, only thing i think of could be stress as they are in the herp/invert room where i spend alot of time. Any ideas?