Walked into a real winner my last place yesterday. A 24yr pony, foundered. It had been lame. I pulled the right front off, the horn wall was about 2mm shorter than the sole, so I took a thick leather pad, made a rim pad and shimmed the horn wall so I had clearance of the sole. Pony liked it. Left front I thought would be the same, until I lifted the hoof and looked at the sole. I pulled the shoe and found the horn wall about a good 12-15mm shorter than the sole. So resected the bad horn wall, set an open toed heartbar then vetteced the sides. Pony walked off with a smile on his face. I had to leave the toe open because there was still fluid draining from the area. Why the open toe - just felt right at the time.