I have a coop that has an 8'x10' open area (no roof, just totally enclosed by chicken wire, above also) that butts up next to an old 6'x8' shed (now the hen house) that is totally open where it connects to the outdoor coop. I live in midwest Georgia. While the chickens can get out of the rain, their hen house is totally vulnerable to temperature change. Do I need to worry about "winterizing the hen house"? What temperatures can my 8 chickens withstand and still be happy?