1. From the College of Veterinary Medicine, University of Minnesota, 1365 Gortner Avenue, St. Paul, MN 55108; Northwest Veterinary Dental Services Ltd. (Legendre), 4037 Sunset Blvd., North Vancouver, BC, Canada, V7R 3Y7; and, the Animal Emergency and Trauma Center (Watson), 320 Lindvig Way, Poulsbo, WA 98370