Rat pups or hairless mice have worked before. And failed, but they have worked before! Good luck, and don't lose any sleep. I have had hoggies go off feed for a calendar year and go back to feeding. Uneaten food is why we own king snakes and alligator snappers.
My 3.5 yr old male Okeetee has not eaten for 7 weeks. I know it is that time of the year. When should I be concerned, after how many weeks?
More than one hog has gone off feed that long. Right as they got so thin I thought about euthanizing, most snapped back into feeding mode. I do think brumation helps in these extreme cases, but I haven't dealt with enough to say for sure.