Backyard Chickens

When it comes to birds domesticated and kept for their eggs, meat,
or feathers, no poultry is more popular worldwide than the chicken.
In fact, there are about eight chickens for every human being on
the planet, with more than 60 billion chickens raised annually.
Smaller than the vast majority of other commonplace livestock like
cattle, pigs, or sheep, chickens are generally considered to be both
the easiest working animals to upkeep and the most efficient
producers per square foot.