I was about to leave to meet with a client today and I checked on the mice. I saw that Mousezilla had a baby. I did notice the blood but I have never observed a mouse giving birth, I thought if its anything like a person then the blood is ok, she was being good with the baby so I left her alone and went about my business. A few hours later I came home from my meeting to find 9 half eaten baby mice scattered about the enclosure. Kinda sucks but its life I guess. From my experience it seems for some reason they always eat the first litter, who knows. Hopefully we will have more luck with the next one.