Have read several articles stating that beardies hibernate and that you should lower temps and stop feeding them for a couple of months to assist in this process. Also have a friend who has two beardies who bury themselves completely in the sand during the cooler months before re-appearing with very little colour (almost white) and substantial weight loss once it warms up. He is a bit of a novice like me also. Would greatly appreciate info from anyone who has experienced this or knows anything about it ???