
Some of my '08 pyros at the start of brumation this October. Also brumating the '09 pyros, and the '08 and 09 pituophis. I will warm them all back up this coming February. I have temperatures now ranging from 45 F to 55 F. If it gets too cold I pull back the insulating blankets to let the ambient air into the tubs. Last year I brumated my '09 bulls as the male stopped eating and began to lose too much weight. In the spring they had enthusiastic appetites. I am only brumating to prevent weight loss. If they stop eating after a month I figure they want to cool down. I have only two pituophis who still are eating, and a bunch of '10 pyro babies that are eating so those guys are still being kept warm.
Mountain kings are a montane species which means they are from high elevation mountains (stating the obvious! LOL!) so it is certainly normal for them to go off feed in the winter and brumate.
I was thinking today about species that seem to be hardwired to hibernate, or brumate, such as pyros and pituophis snakes, and other species such as western toads and fence lizards, which will forgo hibernation if they have warmth and light all winter. No matter what I do with my snakes in the way of light and warmth they insist on following the millions of years old tradition of the winter cool down. I guess I would call them obligate hibernators. My toads and lizards are not so inflexible; keep them warm and they eat all winter.
www.repvet.co.za/herp_photoperiod_hibernation_brumation.php
Concerning your range of temps in your closet, if you could get the temps down to 55 F by maybe putting a frozen gel pack in the tub and covering the whole thing with a big quilt, that might help. Where I live its the exact opposite; I have to watch it doesn't get too cold.
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Bob/Chris
Pyromaniac AKA Greatballzofire