Heard someone here say H. arizonesis loves to dig a lot, mine has never done this in the ~8 years I have had him, and if that is what they do I would like to get him to dig, because I'm all about keeping them happy and comfortable most of all. I have him in straight sand now, it's not too fine and not too coarse, but usually pretty dry aside from when he spills his water on it. I have probably about 2 inches of sand beneath him, but he has never really attempted to burrow. What should I do to encourage burrowing? He has a hideaway in his cage, one of those hollowed out half-logs, but he never goes in it, prefers to sit on the sand. Any ideas?