Is it normal if a hatchling Hermann's Tortoise does not burrow at night? Tucker has stopped burrowing about two weeks ago and sleeps on the substrate or his slate. New York is very cold right now so I have his night time room temps at about 73 -75 F. His overnight humidity level is around 70% and he is in a closed chamber only overnight. He has 4 inches of substrate which is mostly organic topsoil and some cypress mulch mixed in. Do hatchlings have to burrow?