12-03-2009, 03:59 AM
Is he not welcome to spend the night in the house or does he want to be outside? As long as he's sleeping on the old sofa by choice, I wouldn't worry about it. He has a warmer, more protected, place to be, and he'll either be smart enough to go in there before he freezes to death or you can get a smarter cat after this one turns into an ice cube.