Looks incredibly solid. How did you protect the interior wood (did you paint/seal it later?) Is that plywood on the inside, with siding on top of it? Also, how are the rafters attached to the walls? Does anyone know, since I'm not sure OP is still active?
Love this coop! The dutch door was a great idea, it has added ventilation, daylight, and a way of checking on the birds without them getting out the human door.