Our chickens are in a (aprox.) 12'x12' horse stall in a six stall barn. Two of the four sides are solid (one with a barred (for horses) window that we leave cracked open in warm weather. The other two sides are solid from floor to about half-way up, where they become rebar-slatted. One of those walls also has a sliding stall door of the same construction. The stall is topped with solid wood "ceiling" (hay loft above). We added hardware cloth to the semi-open parts of the walls before the chickens moved in. The chickens get to pasture daily within electric netting that is connected to the barn, so they can move freely from the stall, to barn, to pasture at will. They exit the stall through the sliding door, so it is a big opening. Does anyone have a similar situation? It works well for us, but I am unsure of how to winterize it. I am guessing that I should wrap the open sides with something, but still leave some space at the top for ventilation. Someone suggested that we add a smaller enclosed "house" inside the stall wher they can all (16 currently) snuggle up to share body heat and avoid drafts. I would welcome any suggestions, especially if you have materials or techniques that you have used successfully in similar situations.