The invention includes embodiments that provide an aviary enabling hens to move through a much larger space than is available in conventional battery cages. The aviary includes a floor. The aviary also includes a first aviary cage, a second aviary cage, and an aisle. The second aviary cage is positioned at a height from the floor greater than a height from the floor of the first aviary cage. A first perch extends from the first aviary cage and into the aisle at a first vertical distance from the floor. A second perch extends from the second aviary cage and into the aisle at a second vertical distance from the floor. The first and second vertical distances from the floor are not equal to enable an animal to hop between the first perch and the second perch.
