I have 4 horses, one of which we like to feed by himself so he can eat all of his hay before the others push him out. I have a small circular ring with a gate inside the pasture where we feed. He goes right into the ring to be fed and as long as the other horses have feed they won't bother him. However, as soon as they are done, they open the gate (one way gate that goes against a post) and push him out. I would love to just leave him in there and not have to lock it and then have to come back to let him out. Does anyone know of a gate/device/latch that would allow him to push out after eating, but not let the other horses in?