We need a coop, but are pretty tied up in terms of time so we were looking at prebuilt sheds as a starting point. Unfortunately the "best" option locally is built with pressure treated walls and floor. These chickens are being raised organically so that poses a problem. It is acceptable to use the pressure treated lumber as structural as long as the animals have no access. Even ACQ pressure treating is not currently allowed. So I was planning on lining the inside with some kind of untreated plywood and glasbord for the flooring. If I'm going to panel the inside anyway should I go ahead and put a few runs of insulation in there? Obviously I've got to cut lots of ventilation holes, but those will be framed in so it wouldn't expose the hens to the insulation. Also since I'm asking something already, what is everyone's opinion of run rotation? I can't easily move a tractor out in the field every day to give them fresh pasture, but I could easily setup 6 different runs and shift them weekly. Would that actually help keep the grass from being killed off?