Here is Ronan who likes sitting on top of his tube instead of in it. This rat purrs! I kid you not. Perhaps he learned it from the cats. When you are petting him he begins to purr.
Yep he is a chubby one. We find pvc plumbing pipes are the best. The rats can chew and chew and not destroy them. They are easy to keep clean as well.
Behr taking a long winters nap