i have 75 adult laying hens in an 8ft x 16ft x 6ft ceiling coop. the coop is nearly all roosts, nest boxes are on two walls. they also have an enclosed, solid roofed but un insulated run next to the coop that's also wired to be predator proof and can be covered with poly in the winter[i live in Minnesota] the outdoor run is my feeding area and they have about a half acre of fenced grass\trees for free ranging in. the bigger the coop the more birds are needed to keep it warm in winter. there are a few worn patches in the high traffic areas, mainly the gate to get out of the fenced run.