1. Ruminant Nutrition, Department of Animal Sciences University of Göttingen Göttingen Germany
2. ETH Zurich Institute of Agricultural Sciences Lindau Switzerland
3. ETH Zurich, AgroVet‐Strickhof Lindau Switzerland
4. Leibniz Institute for Zoo and Wildlife Research (IZW) Berlin Germany
5. Institute of Animal Science University of Bonn Bonn Germany
6. Food Animal Department, Vetsuisse Faculty University of Zurich Zürich Switzerland
7. Clinic for Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty University of Zurich Zürich Switzerland
8. AgroVet‐Strickhof Lindau Site Lindau Switzerland