So I have five girls...or so I thought. I discovered one of my boys was actually a girl who ended up pregnant because she was with boys (I posted about this a bit ago). Anyway, momma, known as Porker, had two babies, one didn't make it

The baby turned three weeks old this past thursday and is a boy so he was separated.
Well, I decided to put mom with my other five girls. I was going to connect her cage with theirs...that was the master plan. I put momma in with the girls and they were all fine for a few minutes. Then, one of my girls, Sally, picked a fight with her and bit her ear. I immediately separated them.

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Side note: when I first added Sally to my other girls (only three at the time), they didn't get along. She climbed out of her cage and into three girls' cage over night. I discovered them all together and everyone was perfectly alright. They have been ever since. It was weird.
Today, I tried to put one of the other girls, Splotchy, into Porker/momma's cage. Momma chattered and Splotchy attacked, only getting some fur, fortunately.
I really really don't want momma to be alone. I feel so bad for her. Is there anything I can do? Should I put them in a completely different cage/setting when I introduce them? She is older than all my piggies and she is blind in one eye. She got along with the boys when she was in there...when I thought she was a boy.