Hi all! I am new to this forum, but have a question regarding keeping chickens in the winter. I have a raised 4X6 coop. The rafters are open by the roof. I have read that chickens need ventilation, but not drafts in their coop in the winter. Should I close off the openings completely for the winter to keep the chickens warmer? How much ventilation should I have? Thanks. Any other advice you want to give about keeping chickens in the winter would be greatly appreciated.