I just made this coop. It's 6'x4' so I'm wondering how many chickens I should keep. The attached run is 150 sq. ft. I plan on free-ranging my chickens also when they get older. I used plywood, 2x4s for framing, and timbers for the uprights, as well as a bunch of 2x2s. We are in So. Il so we are relatively warm in winter. Anyway, that's me!