My 2 year old TB, Tommy, seems to be accident prone, too. I have had him for about 3 weeks, and no matter what I do, he seems to have a new wound on his head or neck. I put him on a really good skin and coat supplement, a daily vitamin, a hoof supplement, and a joint supplement as well. For his topical, there is a wonderful product on the market called Vetericyn. I get the hydrogel spray, and all of Tommy’s wounds seem to heal, without scarring, in half the time.
Just a side note…have you had a veterinarian check his hooves and legs? Sometimes, just making a slight correction in shoeing make’s all the difference in the world.