That's what a lot of my Jello, pudding, and macaroni boxes look like. We've seen it a few times. It's an awfully large rodent. Quite hairy on top, and surprisingly it makes a lot of noise. It seems to really like cheese as well. I actually got a picture of it after it managed to get into my flour.
Maybe I need a cat. Or something bigger like a cougar that loves small children.