I have 9 chickens and 2 ducks. They free-range for a good part of the day when i am home and they get put in their run when no one is home to watch out for them. I was wondering though with winter coming along, is it even worth it to have them free-range when the ground is covered in snow or would they be fine in their run? They have more than enough run space. Probably 500sqft or so.