About a week ago we noticed that three or four of our birds are not sleeping in the coop any more. Our chickens do not free range but are in a substantially large run throughout the day and are able to go in and out of the coop as they please at any time of the day or night. 4 of our birds have been living in this coop/run since they were chicks, and the 3 others we introduced about 3 months ago. Up until this point we have not had any issues with any birds sleeping outside of the coop. In fact it is a mixture of our original birds and the new ones that are now sleeping outside. Last night was the coldest night we've had since they started this new trend at 28 degrees. Tonight they are calling for a snow/ice mixture well into tomorrow with temps getting down into the teens which is why I need some help. Should we be worried that they aren't sleeping inside?? Why aren't they sleeping inside? Could it be too hot in there? and Should we put them in there and close them in until the morning or just let them do what they want??? I'm guessing my husband will put a light in the coop tonight to keep the water from freezing over more than to keep them warm, the light keeps the coop right at 32-34 degrees, so will they be ok if we close them up in there??? Sorry for all the questions, this is our first winter with the girls and have already experienced some disappointing frost bite on our roosters comb =( I'd hate to see more damage done this winter. Thanks!!