The cold has descended. The house won't be kept very warm (too $$$). He got sick once a few weeks ago when the nighttime temps were in the 50s. What are some ways we could keep him warm throughout the winter? We thought maybe a heat lamp type set up but that doesn't seem plausible because he needs nights without light. A heating pad wouldn't keep him warm because he is never on the bottom of his cage. What does everyone else do?