I'm not quite sure where to post this, but I've got a question about housing rats. Is it imperative that you have more than one rat so they can have friends, or are they okay by themselves? I've heard mixed opinions saying both things. I would love to have more than one rat but can't have another one right now, so would mine be okay until I can get another one? He's really social and even plays with my cats. Okay, it's probably not really playing but if either one of them is going to get hurt it's the cat.