1. Dairy and Swine Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, Québec, J1M 0C8 Canada
2. Rowett Institute of Nutrition and Health, University of Aberdeen, Aberdeen, AB21 9SB, United Kingdom
3. Faculty of Veterinary Medicine, University of Calgary, Alberta, T6G 2P5 Canada
4. Unité Mixte de Recherche, 1080 Dairy Production, INRA, 35590 Saint-Gilles, France