Problems feeding on a hillside

Two of our horses are on about 10 acres of "pasture" right now. Pasture is in quotes because it is a fairly steep mountainside. The horses are fine on it, we ride in the mountains anyway, and there are flat areas here and there.

So, the problem is that when we feed square bales of hay we try to put the bales behind a stump or something, to keep them from getting rolled down the hill and out of the fenced area. Today I found a bunch of hay that the horses couldn't get to because it had rolled down the hill and under the fence.

We're going to put in some posts with bucket holders on them to hold buckets for feed. Right now when they finish their feed the buckets tend to get knocked around and they roll down the hill. Bucket gathering has become a daily chore, but that will be fixed soon. Their stock tank of water sits on a flat spot behind a large tree.

So, does anyone have any ideas for a "bale feeder" that we can cement into the hillside? I don't want to spend a fortune, but I don't mind spending some money for something that will work well and is durable. DH and I are pretty handy so we can try to build something.

Here's a pic to give you an idea of the situation.

Hm, do you feed small square bales or large ones? Do you feed the entire bale all at once?

You might try to open the bale and throw out flakes of it. Then, it would lie flat and not roll down the hill.

Only other thing I could think of would be to buy some kind of roundbale feeder, cement posts in the ground that would go just around the inside and put the feeder around the posts.

What about 2 t-posts with caps and that wire fencing with 2x4inch squares? That seems fairly safe for the horses and would keep the hay from falling through.

We feed small square bales. I usually split them up into four or five chunks of hay and set them behind tree stumps. The horse move it around and nudge it a lot while eating, so even when it is in fairly small pieces, they still end up rolling down the hill.

The t-post and fencing idea sounds pretty good. If I understand, it would be kinda like a fence that you would put the hay against. Sounds doable and cheap. Thanks a bunch! I'll give it a try.