Jan Butler Jan has specialized in equine radiography and has 30 years experience in this field. She currently works in private practice at the Willesley Equine Clinic in Gloucestershire, UK. Chris Colles BVetMed, PhD, Hon FWCF, MRCVS Chris is a senior partner in Avonvale Veterinary Practice, UK, specializing in equine orthopaedics. He is recognized by the Royal College of Veterinary Surgeons as a Specialist in Equine Orthopaedic Surgery. Sue Dyson MA, VetMB, PhD, DEO, FRCVS Sue specializes in lameness diagnosis and diagnostic imaging at the Centre for Equine Studies of the Animal Health Trust, Newmarket, UK. Sue is recognized as a specialist in Equine Orthopaedics by the Royal College of Veterinary Surgeons and holds the RCVS Diploma in Equine Orthopaedics. Svend Kold DVM, Dr Med Vet, CUEW, RFP, MRCVS Svend is a partner at the Willesley Equine Clinic, Gloucestershire, UK. He specializes in lameness and orthopaedic surgery and is recognized as a Specialist in Equine Orthopaedic Surgery by the Royal College of Veterinary Surgeons. Paul Poulos DVM, PhD, DipACVR Paul has his own consulting practice, Poulos Veterinary Imaging, based in Ukiah, California, having formerly held senior positions in academia at the University of Utrecht and the University of Florida. He has published widely on osteochondrosis, navicular disease and diseases of the fetlock.