I have a Sulcata that has begun using one of my Gopher Tortoises burrows. I placed a large Dogloo (dog house) over the entrance so that I could keep the space heated for Charlie. Charlie went in & out routinely until about 2 weeks ago. I haven't seen him since and the temps are dropping here (Pensacola, Fl.) Today I decided to start digging...Ugh! The burrow is too deep and too long...lost cause. Any ideas on getting Charlie to resurface for food etc.??? Help...Larry Northup