First let me introduce Ching (California White), Chang (Rhode Island Red), and Chong (Brahamia) This is the coop I built... uhh, I mean am in the process of building, and I have a question about keeping these egg machines happy all Winter. As you can see the coop part is closed in on all sides but the gaps between the rafters. I got these chickens from a local farmer so Im guessing they are pretty cold hearty. I know they need fresh dry air more than they need warmth, but I live in Denver and it can get pretty cold up here in the Winter. The coop is 3' x 5' so theres probably a little more than 15 square feet of ventilation as it is now. My question is do you guys think I should close the roof of the coop up and put vents that I can open and close, or is that not necessary? I was also thinking about just putting up facia and soffit around the coop part of the roof. Any ideas?