From what I hear you don't need to worry that much about the cold, since chickens have their fluffy feather coats to keep them insulated. Lack of air flow above their heads in the winter can cause frostbite and respiratory issues though from the moisture and ammonia buildup in the coop having...
Hello! Feel free to take what I say with a grain of salt. I have no experience with chickens yet, but I'm also shopping for a prefab coop to start a flock with. I originally was also looking at the Sentinal, but I've since switched to considering the Zylina coops. Better ventilation, but I'm...