This is just my opinion but I read a lot about people worried that their chickens are cold. Whatever the temperature is in your local area when it gets what you consider cold a lot of especially backyard chicken folks seem to get worried. I am in no way an expert but from what I have seen over the past few years they seem to handle the cold just fine. We have 21 chickens and two different coops and it's been as cold as -18 here in Indiana. I have not seen my chickens in distress they seem just fine as a matter of fact it was 5 degrees the other day and I saw one chicken just sitting on the ground in the Run all puffed out just like it was a warm summer day and they were sitting in a dust bath. Frankly I think chickens are in more distress in the summer heat then they are in the winter. I believe we as humans feel for them and in turn assume that is too cold when in fact they are built to handle it. The point of this post no matter what you are raising no matter if it's chickens other livestock or even dogs I believe we need to stop assuming just because we can't handle the temperatures that they can't either. When I was a young boy we raised a Siberian Huskies they were outside all the time they had a dog house they had water and back then and most dogs were not as babied if you will like they are now. Let's face it in Alaska the Huskies were outside and when the snow would come it would snow over them and that would become their warmth they would tuck their nose in to the snow or the snow bank if it already snowed and they were fine. I say make sure they have food freshwater and let there natural instincts take care of themselves.