Free chicken tractor plans are available on BackYardChickens.com, Instructables.com and Omelays.blogspot.com. Plans are available for a variety of styles and sizes, and many of the plans include step-by-step tutorials and pictures of the building process.
A chicken tractor is a portable coop paired with a wire or mesh enclosed chicken run. The chicken run is left open at the bottom to allow the chickens to forage for bugs, grass and weeds. When the chickens have exhausted the resources on one patch of land, the chicken tractor can be moved to a different area. Popular chicken tractor building materials include used pallets, PVC pipe and corrugated metal.