Hi I have an 18 yr old twh. He has been walking kind of differently lately. When his back hoofs pick up and hit the ground they twist out a little bit. My trainer thought it was arthritis since he's older. What do I look for in lameness what is the difference in arthritis and lameness. I know you can ride a horse with arthrits but not one with lameness. Also, I recently noticed on his hind legs on the opposite sides of his chesnuts he has small cuts on both back legs. They are small maybe less than an inch wide and less tha half an inch deep. Could that cause lameness? What are some good medicines to buy to heal the wounds nicely?