We have about 6 months of winter type temperatures and 3 months of really nice summer. The other 3 months can kinda go either way. We have a smallish coop (6x6), and we want to have at least 12 chickens in that space. I think we are going to try to increase the space by making the roosts really high over a sort of second story loft. The nesting boxes are inside the coop, so that takes up some "space" but I'm not sure how much that matters to the chickens as they can still move under the boxes. Anyway, right now (and even in the winter) I will let them out to free range pretty much as much as they want, but some days its so cold I won't even open the doors (-40F). Last winter we were subzero for several months, and the snow has only been gone for a month. The outside fenced run is covered at least partially, so there won't be snow there. Will they use that on cold days? Or will they need a really big coop (we're planning on expanding at least some this fall, but we also want to get a few more chickens. Tell me what I need for the winter months to keep my chickens happy. Oh, the coop is insulated and vented.