Horse refuses to eat in stall during grain feeding

I don't agree with this. It's true that missing one meal isn't going to kill the horse. But I have seen horses that are always too anxious to eat because of how they are managed, and will drop a lot of weight. Just doing the same thing every day won't necessarily solve the issue of his anxiety to go out. He may just skip his grain every day. It can take a long time to eat 6 lbs. Of feed. If he really needs that to keep weight on then you have to figure out how to get him to relax and eat it.

Is there another horse in an adjoining stall near his feeder? If so could be personality conflict and his feeder needs to be moved. If he's the only one inside, he wants to be out with the others. If he's a lone horse, he sees the stall as a trap. Why not feed him just outside the barn and stay with him? Get comfy and be with him.

Problem SOLVED! And lesson LEARNED! This is NOT a behavior issue! Poor guy has ulcers! Started giving him you Gard by Corta Flx and it has made a remarkable change! He now eats every scrap! He is so much happier and relaxed! He is now very eager for his supper and ignores his hay for his grain! He should start putting on more and more weight now! Im not used to him eating so much!

Glad you found an answer. Now that you know its ulcers, ensure that the "grain" you are feeding him, doesn't actually have any grain in it. Grains will aggravate ulcers. Check the ingredient list.