I agree although before we move on I'd like to say that while 50 or above is comfortable for us, for a chicken much above that could be pretty uncomfortable... it was 60s and 70s here recently and they were panting. You are cold because you are naked, bare skin exposed to air. Chickens are not naked. They have their very own down coats. Now, I will say when it was -5 here 2 nights I brought them into a garage but only because they were still pretty small and the coop is a coop kit from TSC so small and not that well built or air tight at all. In a PROPERLY ventilated coop and bigger, well built, not a 3x3 box, it wouldn't even have been an issue and I wouldn't have brought them inside.
In smaller coops or anything other than the Woods coops it's commonly recommended to have roosts at least 12-18 inches below any vents so that would definitely prevent drafts. My new one we're building is 4x8 and will have 2 gable vents on each ends, under eave vents running the full 8 feet, plus a couple windows that can be opened or closed. My walls are 4 feet high plus the roof so really the vents will be near 6 feet so plenty of room to have ventilation and no drafts. With the Woods coop design you also have to keep in mind that the minimum size for that is about 10 feet widewide by 16 feet long. So of course in a tiny box they would ABSOLUTELY have drafts and cold and other issues being right next to the window. But not in a properly build woods coop. When the roosts are 16 feet (or often way more) back away from the roosts, there really are no drafts that far back even if it's cold near the front. Cold maybe and sure, a lot of these coops are just as cold as outside, but no DRAFTS. Cold temperatures and drafts are vastly different. Cold is NOT a problem. Ventilation is extremely important and even more important in the winter. The hot, moist and humid air needs to get out. That is what causes frost bite. Not cold air alone. Plenty of stories of people adding heat lamps or sealing up the coop air tight or insulating it. That causes way more problems than just cold. Again, cold is not a problem and what is comfortable to us is NOT comfortable to chickens. We are naked. Chickens are not. Try putting on your best down coat and then say you are still cold in freezing weather or comfortable at 50. Someone once said to me/compared it to a ski lodge. Are you comfortable inside the ski lodge with your down coat and all your gear? No? Well neither is your chicken. Or your dog. Because they are NOT naked.
Read this article:http://www.backyardchickens.com/a/chicken-coop-ventilation-go-out-there-and-cut-more-holes-in-your-coopEdited by KDOGG331 - 5/3/16 at 1:53pm