So I was sitting in bed when I heard furious squeaking coming from the tub with my mouse and her nine babies. I looked in and she was dragging one of them around the cage. I thought maybe she was cleaning it or something, but I grabbed her and put her and the male in their cleaning box when I noticed a huge gash on the baby. I rubbed my hands in the bedding, took a few pictures, checked all the others, and put them all back, with the injured one on the bottom. When I put mom back in, she ran over and grabbed another baby and started dragging it around.
I'm not really sure what to do! The babies are eight days old today, do they still eat them when they're this old?

Here's a picture:


Help!