Julie Goodnight suggested applying pressure to the reins whenever their head is up. Don't yank on the mouth or anything--apply just enough pressure to be uncomfortable so the horse will look for a way to escape it. The second their head lowers, give him the rein. After a few repetitions of this, the horse was walking with a relaxed neck. It is all about timing though--you need to release when the horse starts to lower its head so he know what you are asking of him.
I have never tried this technique myself, but it sure worked for the horse in the clinic she hosted!
| Kubie, Appaloosa (RIP) | Patches, Pinto Arabian Pony | Scotch, Paint Quarterhorse |