My cute 9 year old helped me winterize our repurposed play house coop a few days ago and we've had multiple very rainy days ever since. I used very thick contractor plastic over the open air portion of the run to give them an extra place to stay dry in addition to the coop itself. They free range in the yard around their house but I've seen them hanging out in the new covered area during downpours. Next I need to deal with lighting. I'm going with rope lights inside their house on a timer I think.