By Kenneth W Hinchcliff, BVSc MS PhD, Dip ACVIM, Professor, Equine Medicine,; Raymond J. Geor, BVSc, MVSc, Diplomate, American College of Veterinary Internal Medicine, Assistant Professor, Division of Large Animal Medicine, Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada; and Andris J. Kaneps, DVM, PhD, Diplomate ACVS, Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State Universtiy, USA |