I am currently taking care of a blackneck garter that has gone over three months without eating and is starting to drop weight. I want to try and snap him out of it with a short brumation, and hopefully he will eat afterward. Also want to try this before he loses so much weight he starts to get sickly, as he's still pretty healthy.

I've never brumated my snakes before, and I'm not overly familiar with blacknecks in particular... But I know they come from a more southern environment where winters are warmer. Can anyone on here who's brumated a blackneck before give me advice on temps and how long would be good?