1. Department of Animal Sciences and Industry, Kansas State University , Manhattan, KS , USA
2. Department of Animal Science, Michigan State University , East Lansing, MI , USA
3. Technical University of Munich , Liesel Beckmann Straße 2, D-85354 Freising , Germany
4. Teagasc, Animal and Bioscience Research Department , Grange, Dunsany, Co. Meath , Ireland
5. Basque Centre for Climate Change (BC3) , Leioa , Spain
6. Ikerbasque — Basque Foundation of Science , Bilbao , Spain