This is the coop I had built 15 years ago. (pic 1) The design works very well for climates where it doesn't get too cold but it does get too hot. In the next month I need to do some repair work and power wash the inside....I would show the inside but it's full of misc items. The back part of the coop is where the roost are and under the roost is very strong fencing, like a hog panel (cut to fit) with welded wire on top of that. All of the poo falls to the ground and it is soooo easy to shovel it up and put it in the compost every couple of months. I can fold down the three sides around the roost area in times of really cold weather (pic 2), but here in central Texas it doesn't usually get below the mid-high 20's in winter. Hopefully...this fall I can talk my husband into building me a cordwood coop, in this same design-but larger. I want a split house/yard for my layers and my (future) meat birds now that I have found a processor. The cordwood will keep the birds insulated from hot and cold (pic 3-not my photo from http://www.motherearthnews.com/uploadedImages/SpecialProjects/Eggs/beautiful-full-1.jpg). All of the beautiful coops on this forum have inspired me to repaint and pretty-fy it up. Although I do kinda dig the 80+ year old barn sides we used for part of it.