Grow Out Pen - 3 Layer H:9.5"Power washable & rust proof stacking grow out pen is perfect for rearing teen quail, pheasants, partridge, or small game birds. For pullets (chickens), teen turkeys, ducklings and goslings, view our taller 15" models. With 9. 5" of headspace, this unit will ensure your birds grow up safely before joining the flock. To prevent bird wetting, closed nipple drinkers receive clean, algae free water from the water tank above. The unit boasts lockable wheels