I think rats are generally nocturnal creatures from what I remember. Don't quote me on that, though.

I wish I had my old nutrition for pets book on me as they did cover rats and the like in detail. The main thing is to make sure they don't get overweight so treats have to be at a minimum.

http://www.aspca.org/pet-care/small...../rat-care.aspx this seems to be a good general guide to follow for the most part.

Omfg. I must come play with them.

 teahound has a pair of rats and has had them in the past before, too. Definitely who I'd go-to with questions about ratties.