1. Animal Breeding and Genomics Centre, Wageningen University, PO Box 338, 6700 AH Wageningen, The Netherlands
2. Behavioural Ecology Group, Wageningen University, PO Box 338, 6700 AH Wageningen, The Netherlands
3. Livestock Research, Wageningen UR, PO Box 65, 8200 AB, Lelystad, The Netherlands
4. Adaptation Physiology Group, Wageningen University, PO Box 338, 6700 AH Wageningen, The Netherlands
5. Department of Psychopharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS) and Rudolf Magnus Institute of Neuroscience, Utrecht University, PO Box 80.082, 3508 TB Utrecht, The Netherlands
6. Behavioural Biology, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
7. Emotion & Cognition Group, Department of Farm Animal Health, Faculty of Veterinary Medicine and Rudolf Magnus Institute of Neuroscience, Utrecht University, Yalelaan 7, 3584 CL Utrecht, The Netherlands
8. Louis Bolk Institute, Hoofdstraat 24, 3972 LA Driebergen, The Netherlands
9. Animal Welfare & Behaviour, School of Veterinary Sciences, Bristol University, Langford House, Langford, Bristol, BS40 5DU, United Kingdom