Okay so this girl I met is going to need to get rid of her 4 females as she is moving and can't keep them and I've been wanting rats. So being the kind of person I am I offered to take them hehe. I spoke with the girl and she said if you stick your finger through the bars they bite. I asked if they we're just "tasting" to see if it was food and she told me no that they bite hard enough to draw blood but don't bite any other time. Is there a way to stop them from doing this in case say someone sticks their finger in? I don't want anyone to get bit.