We are currently having the coldest winter since I got my chickens. I thought I had enough ventilation in the coop but now I'm not so sure. So here are some photos and I'm very open to suggestions. I have 12 chickens. The coop is a 4 x 8 raised coop. I currently have all the windows closed. The pop door is open during the day and closed at night. Since these pictures were taken the roost has been Lord about 10 inches. The highs are not expected to get out of the teens for the next few days.