O.K. so chickens don't need heat unless there are extremely low temps. How low? I have done all the standards to my coop...insulated, plugged up holes,vcaulked gaps, etc. The interior of my hen house, at night, with all the doors, and windows sealed up tight, is only a few degrees warmer then the outdoor temp. I thought they were supposed to be making their own heat!!! My house is small 4x4x4 and it should be toasty warm in there with 8 silkies (6 are roosters, in case anyone is looking for one, or 6). If someone could PLEASE help me figure out what I have done wrong (or not done) I would appreciate it. How cold do they have to get before I do need to worry, and how should I warm them up when it does happen? I live in Mi. I guarantee there will be weeks of below 0 nights with ugly wind, etc... I am not trying to create a spa for them, just keep them safe and healthy. I KNOW if they get too cold they will die, or get frost bite.