I don't have a pattern REO but I did have one at one time for a big horse who was the biggest slobber ever. Most of his feed ended up on the ground so I did try a feed bag. It was a circle on the bottom, made from heavy duty canvas, then a piece of canvas sewed around. There were gromets in both sides which you can get at Hobby Lobby or maybe a hardware store and a flat nylon.piece like a headstall with clips attached to go behind the ears. It was way too deep and went almost up to my horse's eyes. Should have been shorter. They do have to have something like a fence post or a board or something to prop them up on so they can get to the bottom of them. They are quite a nuscience but I was feeding a large amount of feed so I thought it was a good idea at the time but it didn't last long before I got annoyed with it. Only other thing I have to warn you about is at the time I was feeding sweet feed and OMG that thing stunk like you could not believe and it was impossible to get the odor out. Give it a shot and good luck with it.
