Rats are Smart

I admit it. I was cheap.

You see, at pet stores there are two kinds of hammocks you can buy for small animal cages. Some of them have pockets that the critter can crawl into to sleep, but they cost a few dollars more. I usually buy this type for Sparty--it may have saved him when he had to spend an evening in a house with no heating over Christmas--but I figured he wouldn't need one over the summer.

Thing is, I think he likes the pockets. He's already carefully chewed the two cloth layers of the hammock apart to create a hole he can crawl in...