They cuddle up in the pouch and I hear nothing from them all day.
But in the first half hour of them being out, I dont know whether peeka (the smaller one that was biting) gets abit over excited but she runs frantically for a few mins, striping branches like mad and nibling on almost everything in the cage ... including boo's legs

I dont know how hard she bites her. She does it for about 15 mins on and off, sometimes its 1 nip and then i hear a hiss and see a little swipe back from boo and then peeka runs away but then comes back and does it again. If its carries on for a few seconds I put my hand in to split them up but I dont wana scare the both of them and I dont reallly know how your supposed to teach her to not do it. I move her away as far as possible but she normally jumps back quicker than I can take my hand out the cage...
She did it last night for about 20 mins and it's started again tonight. Peeka wont follow boo around the cage to bite her but if they're both on the ground together ... they spend alot of time grooming on the ground, then thats when she'l bother her. I guess if she was biting hard ther would be visible wounds? I've picked boo up and ther are no cuts or scratches on her so I dont know whether she is hurting her or just being annoying. Like I said, they normally get on great, its just the first half hour of being out of their pouch that peeka goes abit mad ...