So I got two female rats from a pet store about six months ago. For a long time they were fine together but then about 3 months ago the smaller one(Alexis) started biting Alice. Nothing serious but they are still bites. Then she stopped for a while. I left them together because I didn't want them to live alone. Now she's been doing it again. We recently got 3 more adult rats and they had two litters of babies(accidents) after quarantine I put Charlie(female adult around the same age as them) into the cage with Alexis and put Alice alone. Alexis and Charlie haven't bitten eachother once. I'm confused as to why Alice is the only one that gets bitten.