We are building a third coop for our girls, we have 14 all together. 12 red sex, and two something else, supposedly something that lays blue eggs. The newest coop is 8'x 4' and 2' high. That's only big enough for a max of 8 chickens right? My dh feels that it's too big for the six we plan on putting in there, and that it should hold more than that.