I have been researching coops for my soon to be flock (6 chickens, 5 full size and one bantam). I read that I need at least 8 sq ft. per bird in a run (I cannot allow them to roam because they will be "stealth" chickens. I found this coop on eBay and was wondering what advice I could get about how I would need to modify it to make it secure, warm in the winter, yet cool in the summer (Oklahoma temps range from 100+ in the summer to 0 in the winter). Alternatively, does anyone know of specific plans for one of these that has the raised house and two nesting boxes? (I will be moving it daily for the closest 'free range' effect I can get, so it cannot be too heavy...) I like that it is 12' long and almost 4' wide.