About 5 years of age a horses ligament elasticity begins to wear out and the suspensory ligament stretches out causing microdamage. This cannot be diagnosed at this time by ultrasound, x-rays or physical exam. There is no indication to give your horse time off until it is lame. Feeding Stamina Plus Equine Flex can help reduce inflammation, increase joint fluid and aid in repairing the microdamage tendons to prevent further injuries.