I have the Playhouse coop (4ftx8ft) exactly like this for my four hens. https://www.backyardchickens.com/coops/images/playhouse-coop-2.jpg Would it be possible to turn this into an enclosed coop so that I could get more chickens? How many could it hold? They only stay in there to sleep and lay eggs, or if it is really cold and rainy, which isn't often. Most of the time they are free-ranging in the yard. Suggestions? Anyone done this? Thanks!