I know this is an over discussed topic but I am still very confused. I have a converted storage shed (8x8x8) with an attached run (21x10x6 high). The run has a wire predator proof top but no roof. I have 20 chicks right now, 2 roos and 18 pullets. There are two large staggered perches that run the 8' length of the coop. I haven't built nest boxes yet... Is their space enough to accommodate them? When I get home after work in the spring/summer/fall I will let them free range in the fenced acre.