I am new to the forum, and we have a Sulcata that is about 30" and close to 95lbs. He has a large burrow in the yard and I'm wondering if I need to heat it for the winter. Any thoughts or suggestions? He has a heated house but can push out and return to the burrow. We are in the Houston area so the weather is hot and can be pretty chilly at night. 40's and a few nights dipping into the 30's.