Again, we live in different parts of the country. Your coop is large enough for your chickens to sleep in. Not large enough for them to spend any amount of waking time, though, except maybe laying eggs. My coops serve my chickens' needs. You are right that my large coop blocks the wind. That's really all they need - a dry place out of the wind. I do not provide supplemental heat for my chickens and have had no problems with frostbite in my flock, despite over a week of weather when the highs were still well below zero, and lows in the -20's.