I am new to this chicken thing and this is our first winter with 15 ladies and two boys. We repurposed a cubby to a chicken coop as the kids didn't play in it. It is an 8'x8' with a covered 8x11' run. Our winters can be cold. On average -10c but down to -20c in Jan Feb. This last week it got down to -5c. There was some moisture on the window, but I don't think it got down below freezing inside as the water didn't freeze. My questions are: Ventilation is important but, Drafts are bad. How can you have one but not the other? I've started to insulate the coop, the ceiling is done. Insulating the coop will reduce the drafts but. We utilize a poop board and scrape it everyday. Soon will be utilizing PDZ. Any input welcome.