Backyard coops are small and built within a fenced area (sometimes bounded by chicken wire) to let the chickens roam, peck and hunt for insects. If this kind of “yarding” is floorless and can easily be moved (or dragged) from spot to spot it is called a chicken tractor. Many people, moreover in rural areas, keep a small flock of chickens from which they glean eggs and meat mostly for themselves. The number of small chicken coops in urban areas has been growing, which has led to manufactured chicken coops like the Eglu which are designed for more cramped spaces and a tidier look.
Urban settings may have laws which regulate any backyard farming of livestock. Oakland, California bans roosters, with a rule that hens be kept at least twenty feet away from dwellings, schools and churches.