so i had 3 mice 1 male 2 females in a pimped out inclosure these guys had the wheel, the nice house, the works. there great for 3 weeks and the i get two hoppers to feed to stubborn ball but wife catches me and plays hero. so now 5. that was about 2 weeks ago and i check there tub today and ones missing. i found her buried under aspen shavings in there hut. WTF? she had no bruising or blood so ruled out attack. the other 2 originals arent dead so dont think its from the new guys. any ideas. do they just fall out like that. i would say she was about 3 months old.