Chris Colles qualified as a veterinary surgeon from the Royal Veterinary College London in 1971. He went first into a mixed practice and then to an equine practice, before joining the Animal Health Trust in 1975 where he carried out research into equine lameness. He was appointed Head of the Equine Clinical Department before returning to specialised equine practice in 1988. He has specialised for 40 years in equine lameness, being awarded a PhD from the University of London for research into navicular disease in 1981. He was recognised as a Specialist in Equine Surgery by the Royal College of Veterinary Surgeons in 1996. In 2000 he was awarded an Honorary Fellowship of the Worshipful Company of Farriers for research and teaching on horse’s feet and shoeing. Colles became involved with osteopathy in the treatment of horses in 1990, collaborating with the late Anthony Pusey, with whom he published a number of papers on equine osteopathy and thermography, as well as giving a number of joint lectures. Chris Colles has written over 40 scientific papers, and contributed to or written nine textbooks, as well as lecturing around the world, primarily on equine lameness.