Did you know that it is not uncommon for a race horse to dislocate a rib when galloping? It can happen to event horses as well. The horse expands and contracts his rib cage at a rapid pace to meet the increased oxygen demands at high speed. The vigorous breathing that occurs during a gallop can cause the ribcage to be over expanded to the point of subluxation of a rib. A rider that kicks too hard can also cause the problem. During body work that rib will feel higher than the others. Muscles surrounding the sternum and the dislocated rib will feel tight. For upper level event horses and off the track thoroughbreds, checking the ribcage is routine during our massage sessions.