Hey Atlasman!

I have heard of making a shed catcher simply out of two large or four small bales of straw.

You simply put them 8 inches or so apart and place feed in between them.

When a buck tries to stick his head in between them to get to the feed, he pushes against the bales with his antlers or the stick in with just a little resistance to knock them off. I've been meaning to try this myself.