It's cold where I live now and I want to make sure Schiz isn't freezing. If I'm cold I can assume he is as well, if not moreso. For now, I made him a warm hidey out of this old sweater and a small cardboard box. He's chewing the sweater though. I'm lost. Will he just chew on the cozy that I buy for him? I don't know all the can chew-can't chew rules yet.