I installed a poop board in the chicken tractor I built and luv it. My goal with the chicken tractor was to limit my need to go inside. So I designed the poop board to function like a large drawer, which can be removed from the exterior of the tractor (coop), emptied, and slid back into the tractor. The girls never get bothered by my presence, I don't need to go in the coop, and all is well. It works fairly slick. It is about 24 inches wide and almost 6 feet long. Anything longer will be a bit difficult to remove and handle once it is removed. It is lined with linoleum tile, and I use PDZ or similar product in the bottom of the tray so nothing sticks to it.
The only mistake I needed to correct on the original design was that I used half inch by half inch mess to cover the top of the poop board to keep the girls out of it. Come to find out the dropping won't fall through that small of a mesh. I have since replaced it with a vinyl covered chicken wire, which works as intended: keeps the girls out of the tray/poop board & lets the droopings fall through.
HTH!
