Here are all of my brooders, an evolution culminating in a spacious outdoor brooding pen, which I do now instead of using indoor brooders. http://www.backyardchickens.com/a/r...rooder-and-start-raising-your-chicks-outdoors
Carol, I'm always sooooooo envious of your setup! LOL!
Mine is a "grow out" area - for cold weather I cover the "brooder" doors with plastic for wind protection. This is all combined with my runs - the littles can be seen by the adults. I have electric outside, so use a heating pad for brooding.
I just close off different sections as needed, but if everything and everyone is doing fine, then I leave it all open. My adults love to pile into the little "coop" LOL