I specialize in on/off the track tb rehab and am a +6 yr professional bare foot specialist (its more than just the trim in other words....diet, environment, etc). You can put the best balanced trim on a horse and if they are fed molasses and locked in a stall....you're never going to get good concavity or strong hoof wall/deep digital cushioning. Don't feel you can heal by putting more holes in it either.....there is a time/place for glue ons (like major injury) but almost always push for bare or bare in a boot (temporarily). I don't think enough time is spent getting the diet/environment right. Each horse is an individual...I have studied Ramey, Jackson, Rooney and Pollitt, Strasser, and other barefoot approaches. Basic common sense 1. It has to flex 2. frog/deep digital cushioning is the support for the bony column 3. correct heel height and a short toe are key to getting hoof in a balanced state to promote concavity. I have drafts with amazing concavity, thoroughbreds with thick solid hoof walls and straight supportive heels. Still sickened by Morgan/Saddlebred hooves and the manipulation people are willing to go through to supposedly improve the gait. These animals move incredibly without stilettos on and frogs that never touch the ground. NOt to mention the totally inhumane way they are managed. Lock yourself in your room for 14+ hrs and see how happy you are.