A chicken tractor (sometimes called an ark) is a movable chicken coop lacking a floor. Chicken tractors may also house other kinds of poultry. Most chicken tractors are a lightly built A-frame. It may have wheels on one or both ends to make moving it easier.
Example of Chicken Tractor:
Despite their name, chicken tractors is not a machine after all. Chicken tractors are used in the sustainable poultry farms to allow chickens to feed on small bugs or worms on the ground, which they are not capable of doing when they are confined in a caged environment.