I have 6 pet rats I was breeding them for food for snakes but we no longer have snakes and we no longer breed but for some reason my breeding female has gotten very aggressive towards her daughter. They are the only ones in the cage. I am just wondering why? I have just seperated them because Nub the daughter has a big patch of hair missing from the side of her nose and theres a little bit of dry blood. None of my rats have every been alone so I'm not quiet sure what to do. Can anyone help me?