My 6 1/2 year old mare has a large scar on her right knee. I was told that she aquired it as a foal and that it only was a skin injury and that no muscles and tendons were involved. So far that has seamed true, she has never had any kind on lameness or stiffness in any of her knees. She has however from time to time devoloped strange sores on her scar. At first I thought they were simply puncture wounds, how ever they have returned several times since then. These pictures are from the worst time and I got out alot of junk (puss, hard chunks . . . Yuck) and once treated it healed very quickly. May I also say I was gone while this wound developed, if I was home I would like to think it would not have gotten this bad.