Hello, I am in the process of building an 8x10 coop. I currently have 7 hens and 8 chicks in the brooder. My flock has about a 1/2 acre of fenced yard and can also free range in the summer. My question is: with that much room, is a run necessary? I live in Montana and winters can be harsh, but for those very cold days they would stay inside the coop. Would a run or some kind of covering be helpful just for protection from sun/rain/snow? Opinions please?