Arthritis is also known as Osteoarthritis or Degenerative Joint Disease (DJD). Horse, especially the old ones, is one of the animals that have a high risk of this health issue. This is a slowly progressing chronic inflammation that affects horse’s articular cartilage in its joint. It is such a painful disease and causes a lameness. The normal articular cartilage is smooth and slippy that makes the leg moves comfortably while the affected one lost its smoothness causing rigid moves to the horse. The joints in fetlock, hock, knee, and coffin are most likely at risk of arthritis. The reasons why older horses are