I got my little Karma when her eyes were still partially closed and I bottle fed her. She was away from litter mates for about 2 weeks, until I picked them up and put them into quarentine. I picked up a few of her litter mates so she wouldn't be lonely. They have been in quarantine for a while and I have recently made some introductions after switching them into each others homes for about a week. I have never owned rats before so this is new for me. I have tried introducing her one on one with another rat to not overwhelm her. She literally chases the other rat, jumps on it Spiderman style, and then licks or bites it. I can't tell which. The other rat always looks terrified. I don't know if this is aggression or what. I don't want either one of them to get hurt. I think the babies are around 5 weeks old. Can someone tell me their opinion of what she is doing? Should I introduce the 2 bonded females together with Karma or continue doing one on one?