Thank you for your reply. In the past I would bring Spartacus inside during the cooler winter months because I was worried about the conditions required for safe hibernation. If it's okay for Sparty to skip hibernating because of our fabulous AZ winter weather, that is perfectly fine with me. I thought I was preventing him from living the natural tortoise life cycle.

What kind of heaters can be used outside to keep his burrow warm at night? I'll look online and see what I can find.

Thanks,
Kate