1. Agricultural Research and Education Centre Raumberg-Gumpenstein, Institute of Livestock Research, Irdning, Austria
2. Division of Livestock Sciences, Department of Sustainable Agricultural Systems, BOKU – University of Natural Resources and Life Sciences, Vienna, Austria
3. Institute of Animal Nutrition and Metabolism, Kiel University, Kiel, Germany
4. TUM School of Life Sciences, Technical University Munich, Freising-Weihenstephan, Germany
5. Centre for Livestock Husbandry and Equipment, State Institute for Agriculture and Horticulture Saxony-Anhalt, Iden, Germany
6. Bavarian State Research Centre for Agriculture, Institute for Animal Nutrition and Feed Management, Poing, Germany
7. Department of Animal Nutrition, University of Hohenheim, Stuttgart, Germany
8. Federal Research Institute for Animal Health, Friedrich-Loeffler-Institute, Institute of Animal Nutrition, Braunschweig, Germany
9. Agroscope, Ruminant Research Unit, Posieux, Switzerland
10. Department of Cattle Farming, Agricultural Centre for Cattle Production, Grassland Management, Dairy Processing, Wildlife Research and Fisheries Baden-Wuerttemberg, Aulendorf, Germany