Jen, Kernel also doesn't eat much during winter. I live in the Texas Panhandle, and since the end of October Kernel has only eaten 3 adult mice. He just seems to hibernate during the winter, and looks fine. Having my indoor temp set at 72 degrees probably accounts for some of his laziness, but I can't afford to raise the house thermostat up anymore. I expect him to begin eating normally by the end of March. Col. Slithers is nothing short of awesome!
Alan