Well, it seems to be that time of year and he's old enough now. Bleu's been slowing down for several days and yesterday, he went into his cave, for only the second time in his life, and slept all day. He's been showing the classic signs of brumation, which I suspected. He's never used that cave till now, but their need to burrow down made it just what he was looking for. As far north as I am, the days are already about 5 hours shorter than in summer. I did reach in a time or two to make sure he was okay and got the stink eye