OK I'm getting a little concerned... About every three days Darwin gets a burst of energy! Most days he just walks around like a tortoise but when he gets these burst he runs around his enclosure all day. He has made a track in his substrate and he only turns left like a Nascar driver. He has been going non stop for a constant 3 hours! Even if I put my hand in front of him, he will just crawl over my hand. He acts like he is on a mission! Is this normal baby Sulcata behavior? I don't want him to stroke out and have a heart attack. Is he just having fun or should I be worried? Think I'm gonna change his name to A.J. Foyt ...