1. Wageningen UR Livestock Research, PO box 65, 8200 AB, Lelystad, The Netherlands Dept. of Animal Environment & Health, Swedish University of Agricultural Sciences, PO Box 234. SE‐53223, Skara, Sweden Animal Welfare & Behaviour Group, School of Clinical eterinary Science, University of Bristol, Langford, North Somerset BS40 5DU, UK IKERBASQUE Research Professor, Neiker‐Tecnalia Arkaute Agrifood Campus, Animal Production Spain