I currently have a dirt run and am considering adding sand. I started with sand in the coop. My young girls had been sleeping in two of the nesting boxes until I blocked them off. Prior to doing this I just scooped the poop out of them every 1-2 days. When I pulled the sand out of the boxes to block them, apparently there was enough urine in the sand that now the coop has taken on an odor that I can’t seem to get rid of, no matter how much barn lime, Saturday lime and PDZ I add to it. The plan is to remove it all, paint the walls and do hemp bedding in the next couple weeks, whenever the weather warms a bit. That said…I am having reservations about sand in the run. It’s covered but gets some moisture in certain areas when it rains. I’m planning on doing roll up tarps and putting up clear plastic roofing panels on the corner that gets it most. I don’t care to have the same odor in the run that I’m dealing with in the coop, although it would obviously have much better ventilation. My question is, has anyone done sand, horse pellets or other material in their run under similar circumstances and then gone back to dirt?