Hello again everyone! As I've mentioned before in my (somewhat) newer posts, I adopted two female rats in the end of October from a Raptor Facility for rehabilitating injured birds or birds that cannot be released back into the wild. They lived completely alone their whole lives (besides when they had a male rat for breeding and when they had their multiple litters of babies before they were weaned). I adopted them for my amazing little Luna after her sister passed away so she'd have some extra company. I told the woman at the Raptor Program that I wanted them for my rat I have now, she mentioned to me a few days after I told her that, that she put the two girls I was adopting in a tank together on neutral grounds to see how they acted with another rat. One of them started fights with the other and was aggressive, but didn't draw any blood. After I adopted them, I introduced them all on neutral grounds and they took it well. Once I put them all in the cage together (after it was all scrubbed clean and fresh new toys were added of course) the one who previously attacked my other new girl was attacking my rat Luna. No blood was drawn still, except my rat Luna screams bloody murder like she's being hurt, and she rips Luna's fur out as well. Eventually she started attacking the other new rat again to. Over the time I've adopted her, she still bullied them but would cut it out for a bit after I'd yell at her to stop, up until lately in the last couple of weeks she's gotten more aggressive for no apparent reason that I can point out and attacks both of them, and she's ripping chunks of fur out of my Luna again (Luna is still screaming bloody murder when she does that to her and it scares me and beaks my heart). I just took her out of the big cage I own for them and put her in a smaller one (that my friend is letting me borrow for a little bit, so I can't make that her permanent cage or anything), because she started viciously attacking both of my rats again and ripping their fur out more. I have no idea what to do with her. She's aggressive, greedy (with food and toys to the point where she'll attack my other rats if they even walk by while she's eating or chewing/playing with toys), and she bites me and anyone else constantly. My boyfriend mentioned putting her up for adoption but I don't feel that's necessarily the right thing to do. I just don't know if it would be better for my other girls if she wasn't around in their cage anymore. What should I do besides more introductions and trust training? I'm getting very frustrated and upset that she continues to attack my two rats, especially since Luna is my love and my other new rat is such a sweetheart. Any thoughts or suggestions? Thank you to anyone who may respond, I appreciate it a ton! Have a great day/night & Happy Holidays!