Hi Debby - I know you've had rats for many years. How long do they typically live? Amy's been asking, and I said 2 - 3 years, but I'm not sure this is right. Also, do they get really big? Hers is 8 weeks old, and he's about the size of a hamster (not counting his tail). He's really a great little guy. He's already learned to come out of his tubes and climb up on our hands when we're getting him out of the cage. I need to take some pics...