Hey, so I know it was my fault, I understand. Please no negative comments. So the other day I got 2 baby mice (grey and white & tan and white). I currently have 2 adult mice (Argenté & black and white). I put the baby's in the new cage with a barrier - fine. Took out the barrier - fine. There was sniffing but no fighting and a little chasing. So I left them alone for about 20 minutes. When I came back my Argenté had beat up my tan and white baby REALLY bad. She had cuts and her leg was hurt. I feel HORRIBLE to say the least. I separated them. Now what? And also she is limping, is her leg broken? Note: the baby mouse *might* be the runt of the litter, she is smaller than her sister. The 2 baby's are currently in the regular large cage and the others are temporarily in the cage I use while I'm cleaning. Thank you!