Hi all! First post, and I have to start by saying, "Wow! What a wondrous site! Great info, great layout, great attitudes. I'll be here often!" I have six hens -- an Ancona (I think), two NH Reds, three Golden Comets, in northern Vermont, where it was 5 below this a.m.. Raised them from chicks, love 'em. Their house is about 28 sf of floor space, plus two nest boxes. Whole thing's off the ground, insulated floor and ceiling and somewhat on walls. A water heater base keeps water from freezing and helps the room stay warmer than it might... I have a 40-watt bulb in the house on a light-sensitive thingie, which should allow me to have it on for 2 hours after dusk, four, or six, or all night, but seems to just prefer all night. (I'm going out to shut the #$% thing off now.) And their door, an 11 x 12" hole, opens for the day and closes at night thanks to one of those solar-activated door raiser/shutters. My whole operation depends on this; my wife and I often work late, and without an auto-door, we wouldn 't have got chickens. Problem: All of a sudden, the girls aren't going in at night. It's dark and VERY cold now, predators abound, and I find them huddled up on their stairs or under the house. Some have frostbit combs. What's happening? Actually, I realize that the possible answers there are many, so can I also ask: Is it OK to leave their door shut and keep them in their house for a day or two, hoping they'll re-establish their connection to the place and their old routine?