[1] Justus Liebig Univ Giessen, Dept Anim Breeding & Genet, Div Anim Husb Behav & Welf, Giessen, Germany
[2] Univ Vet Med Vienna, Inst Anim Welf Sci, Dept Farm Anim & Vet Publ Hlth, Vienna, Austria
[3] Johann Heinrich von Thunen Inst, Fed Res Inst Rural Areas Forestry & Fisheries, Inst Organ Farming, Westerau, Germany
[4] Swedish Univ Agr Sci, Dept Anim Environm & Hlth, Uppsala, Sweden
[5] Norwegian Univ Life Sci, Fac Biosci, Dept Anim & Aquacultural Sci, As, Norway
[6] SRUC Scotlands Rural Coll, West Mains Rd, Edinburgh, Midlothian, Scotland
[7] Humboldt Univ, Div Anim Husb & Ethol, Fac Life Sci, Berlin, Germany
[8] Aarhus Univ, Dept Anim Sci, Aarhus, Denmark
[9] Norwegian Vet Inst, Dept Terr Anim Hlth & Welf, Oslo, Norway
[10] Univ Basilicata, Potenza, Italy
[11] Louis Bolk Inst, Div Anim Hlth & Welf, Dept Sustainable Agr, Bunnik, Netherlands
[12] Univ Kassel, Farm Anim Behav & Husb Sect, Organ Agr Sci, Witzenhausen, Germany