What do chickens do in the winter. Do they stay inside their coop all winter? Do they go out and scratch around in the snow? Do they need a light inside the coop? Our coop does not have any windows. Are we going to need to put one or two windows in or install a light? Does the door to the coop need to be shut all the time? Also, our run does not have a solid roof, so snow will cover the ground inside. What should we expect?