Back when I used to keep pet rats, I had one that used to chase the cats and grab them through the cage bars. She used to get loose everynight (no matter what I did to keep her in the cage,) and I'd find her at the foot of my bed or sometimes in my parent's bed. I also had an escapee that lived on cat food for two months, the cats didn't seem to mind as I'd see her in there all the time with them but could never catch her. Eventually she got fat and lazy and I found her sitting on top of her mom's cage waiting to be put back in.