'Oat cuisine' occasionally is a useful training tool, although not for all horses. For wildies, and Mops in particular, who really react to pressure (even close proximity in a group to other horses), I've hand fed them one handful or so over the gate after their main feed. Mops used to stand well back from the others standing close up and personal to each other. Now, he's still careful but he's in that group. What's complicated is that when they come in to call for the daily feed, he'll calmly claim one bucket and not one of them will challenge that ownership. And yet he's not the dominant horse in the herd. Interesting, eh?