We have always had our goats outside all winter. They have a large quanzot hut they can get in out of the elements. But, we do have a barn which mostly goes unused during the winter and then we will move goats in there as they start kidding. I'm thinking of locking everyone inside this winter. Maybe give the pasture the winter to rest? It will definitely be more upkeep if they're inside but it will also be easier on them I guess if they aren't fighting as much to stay warm and dry.