1. Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
2. Campbell Centre for Study of Animal Welfare, University of Guelph, Guelph, Ontario, Canada
3. Department of Pathobiology, University of Guelph, Guelph, Ontario, Canada
4. Poultry Diagnostic and Research Center, Department of Population Health, University of Georgia, Athens, GA, USA
5. Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada