As we approach the beginning of the Thoroughbred yearling sales season, it is worth reflecting on the process used by buyers to select their racing and sales prospects. Part of the process includes veterinary scrutiny of the radiographs of yearling's' joints. Veterinarians review the radiographs, note any abnormal findings, and then are called upon to assign a level of risk for racing and / or resale that the findings may represent. Another layer of due diligence in recent years has been ultrasound examination of horses' limbs for soft tissue abnormalities,...