I am about to start constructing a new coop after deeming the prefab I bought a month ago inadequate. Here is my basic design. The back, whis is open in the pic, I expect to have double swinging doors so you can open the whole thing up for maintenance. I will be attaching this right up to my 6x8 run. Any recommendations? Not shown is the 2x4 framing and the hooks that will hold the feeder and water buckets depicted with the blue buckets. The dimensions are 4x6, 4 ft high and the grey areas are mesh or hardware cloth. I did this in a program called Sketch Up Make, and with practice you can actually make stuff look better than this.