Chronic lameness in older horses most often stems from musculoskeletal conditions such as osteoarthritis, which gradually breaks down joint cartilage and leads to pain and stiffness. Other issues such as soft tissue injuries or hoof problems can also contribute to uneven movement and reduced comfort in aging horses. Lauren Trager, DVM, MS, Dipl. ACVSMR, of the Virginia-Maryland College of Veterinary Medicine, in Blacksburg, explains the common causes of lameness in senior horses in this Ask TheHorse Live excerpt.About the Expert: Lauren Trager, DVM, MS, Dipl. ACVSMRLauren Trager, DVM, MS, Dipl. ACVSMR, is a clinical assistant professor of equine sports medicine at the Virginia Maryland College of Veterinary Medicine, in Blacksburg. She is a diplomate of the American College of Veterinary Sports Medicine and Rehabilitation. Trager loves to teach and enjoys working on challenging lameness and poor performance cases, particularly those with neck and back pain and anything that involves advanced imaging.