A friend of mine has a horse with Navicular and it was a long drawn out process for her, but everything is wonderful now. Her horse went off a while back (this is years ago) and it was an off an on thing for a couple of years. He was diagnosed with Navicular pretty quickly, but it took a while to get things under control. With special trimings and shoes (no eggbars) he is dead sound and has been for years now. She does low level dressage, trail rides, jumps and even goes cross country schooling with him every now and then.