1. INRA, UMR1080 INRA‐Agrocampus Ouest, Production du Lait, Saint‐Gilles, France
2. Agrocampus Ouest, UMR1080 INRA‐Agrocampus Ouest, Production du Lait, Rennes, France
3. Nutrition and Food, Animal Sciences Group of Wageningen UR, Lelystad, AB Lelystad, The Netherlands
4. Agricultural Research Institute of Northern Ireland, Hillsborough, Co., Down, UK
5. Institute of Grassland and Environmental Research, North Wyke, Okehampton, Devon, UK
6. Centro de Investigación Agraria Mabegondo, Xunta Galicia, La Coruña, Spain