Abstract: A hay feeder is described for installation in the corner of a box stall or the like including a pair of vertically disposed transversely extending back wall portions secured to the sides or walls of the box stall. An arcuate front wall portion extends between the back wall portions to define a hay storage compartment having an open upper end. The front wall portion has spaced-apart access openings formed therein to permit an animal to feed therethrough. The access openings have a vertical height substantially less than the vertical height of the front wall portions. The hay feeder is comprised of a thermoplastic material such as polyethylene and is provided with strengthening ribs on the front wall portion.