EEZ Feeder - I have this in the barn loft and the hay drops down into the stall below. I purchased it for my colic-prone horse to be able to feed six times in 24 hours and it worked perfectly, feeding every 4 hours. It can also be used outside in the pasture or indoor next to a stall. It is battery operated with the batteries lasting more than a year.
EZ8-7 Automatic Hay Feeder No Door; 8 - 26" wide SHELVES, 7" apart x 27" wide opening to accommodate a generous feeding of hay, grain, cubes, supplements, or whatever you are feeding. The highly reliable electronics and versatile timer allow a variety of feeding schedules. Feed 1 to 8 times/day or/week. Example: 2 feeds/day, someone refills every 4 days.