[1] Univ Vet Med, Inst Anim Welf Sci, Vienna, Austria
[2] Univ Copenhagen, Dept Food & Resource Econ, Copenhagen, Denmark
[3] Univ Copenhagen, Dept Vet & Anim Sci, Copenhagen, Denmark
[4] Univ Pretoria, Fac Vet Sci, Dept Prod Anim Studies, Pretoria, South Africa
[5] World Org Anim Hlth, Stand Dept, Paris, France