The birds I have are heavy dual-purpose breeds that we got specifically for withstanding the Cold of Montana winter weather. We currently have 1 foot of snow on the ground and the weather is 16-20 degrees F during the day. Our 16 birds are cooped up in their little covered chicken run. Before the snow hit, they were completely free range during the day. I am wondering if I should leave their run door open daily so they can choose to adventure outside if they wish. I am concerned, though that their feet might get frostbitten or if they get stuck in the snow and not have sense enough to make it back to the coop. Does anyone else live in a similar climate and what do you do to prevent cabin fever among your birds and keep them from freezing? Any advice is appreciated. Thanks.