I have a female that is like that as well. When i got her she was very thin and weak. She was at the point that she couldn't squeeze a rat hard enough to shut him up. I don't mean they squealed a couple of seconds, they would literally scream for minutes until she finally got the better of them. She then got sick, and spent some time at a friend of mine's place. He has a pet shop, and is a bp breeder. So she was in his rack in the back room, and had a BUFFET of rats. Any rats that he had that had RI's, or were aggressive in the holding tubs went to her. She has literally put on 400 grams in like 3 or 4 months, and she is ready to eat something every time i open the tub. She will even come out after ME. I just tell her I'm a little big for her to swallow, and us something to push her back in. Silly little girl