The one thing I see that really needs to be addressed is ventilation. Sitting out in the sun like that with no shade, the coop will be like an oven! If you made some cut outs in the upper part of the end walls, one on each end for air flow and covered with hardware cloth, you would make it waaay more comfortable for the hens. Moisture/ammonia smells can build up quickly without adequate air flow. Also, if your roost boards were flat (easy to fix with 2 short pieces of 2x4 nailed to insides of support boards, then roost boards nailed to them instead) it would be way more comfortable for the hens to roost. In winter if the flat 4" side is up, then they can sit flat and their feathers cover their feet, so they stay warmer and they don't have to 'balance' so much in their sleep. Other than those 2 things...it is awesome! Great job DH!