When you have poultry or waterfowl grow-outs (but especially waterfowl, since they make such a mess with water), a tractor is invaluable. It keeps them safe from predators but allows the growing birds to scratch, bathe, find bugs, eat greens, and enjoy fresh air and sunshine – creating a “controlled” free range (more precisely, pastured) environment. Buying a well-made hoop tractor can be expensive, so we make our own.