I know I read somewhere about how much square footage is needed per chicken, but now I can't find it. Please forgive me if my post is redundant.... We have 27, 3-week old chicks, and will be building the coop and run soon. I would like to get 5 more birds in the future. Can anyone suggest how large a coop/run we need to build, and how many nest boxes should be inside the coop? We would like to free range the chickens when we are home and the weather is nice, but keep them in the coop/run the rest of the time. Thanx all!