Just wanted to share pics of my chicken tractor that I built a couple of years ago. It's still being used and still just as strong as ever. This winter, I put plastic over the chicken wire and a tarp over the top and kept birds in it all winter. This tractor was built out of scrap lumber and steel that I had lying around the farm. The chicken wire and hinges were the only new items used on it. The rear doors let down and I have nest boxes (plastic milk crates) hanging on the inside...super easy to remove eggs. Those rear doors are made out of the fronts of dresser drawers. There's a roost mounted in the back, and I put a black vinyl piece in front of the roost and nesting boxes. The vinyl blocks the rain and wind during the warm months when the plastic and tarp is removed.