1. Department of Clinical Studies; Ontario Veterinary College; University of Guelph; Guelph; Ontario; Canada; N1G 2W1
2. Yu of Guelph Veterinary Dermatology; Guelph; Ontario; Canada; N1L 1C8
3. Department of Pathobiology; Ontario Veterinary College; University of Guelph; Guelph; Ontario; Canada; N1G 2W1