I live in NE Oklahoma and there are times we have bitter cold wind chills. I have four coops with it’s own run. The oldest chickens and guineas always go in their coop at night no matter the time of year. Ringo and his ladies go in their coop at night. The problem is I have a single rooster that sleeps in the run and only went in his little man cave just to throw the bedding out. There are two more roosters in their own area that go in and out of their man cave all day but at night roost outside. In the last run are two roosters and eight girls. We finally forced one roo and five girls inside the coop tonight and hope they and everyone else gets the idea. Their runs are covered with tarp and dlm in the run so it is dry but we wonder if they continue to sleep outside then if we put pladtic all around the outside of the runs with maybe plywood over that to block the wind would they be ok? With the exception of the older ones that sleep inside, everyone is almost 9 mths or older. Our temps can get down to -15 with the wind chill factored in but only for a few nights at a time. We have different breeds. I am not as worried about them in winter as much as I am during our extremly humid and hot muggy summers. They seem to suffer more in July and August. I bought dog bowls at the dollar store so that in the morning we can put out bowls with water then bring in the bowl that was in the run all night to defeost then take that one out at lunchtime with water and bring in the morning bowl for defrosting then exchange them again late afternoon. I refuse to have electricity out there for safety reasons so they will have plenty of water. Plus we give them pumpkins and cranberries for treats.