So I thought I'd consult the experts. I have a converted horse stall that is the coop with 11 girls 2 boys and two roosters. This week in Montana we've been nailed with the worst weather. Last night was -15F. My coop is not insulated, but I have a thick layer of shavings down as well as a straw "Hut" Shelter I made. I had to tarp the door last night because I know air was coming in, even then the coop is reading 0F. I don't want to use a heat lamp for all the obvious reasons, power outage, fire hazard. I want them to acclimated to the Montana weather.My only issue is we just moved in the beginning of october from Northern Caliornia so is it too cold too quick and should I add a bit of Heat and then work them down. Tonight and Tomorrow are suppose to be our last and coldest nights. What else do you guys suggest I do. I brought our Polish Hen in because she managed to get her entire crest wet and frozen . I think this is her way of getting herself inside. Our coop is connected to our shop which I have the heater cranked on but it isn't warming the coop as much as it is the shop/ rest of barn. PLEASE HELP ME!! Thanks!