Edited by Malin Hagberg Gustavsson, Göran Andersson, Johan Bröjer, Renée Båge, Bengt Guss, Ragnvi Hagman, Linda Keeling, Jan Erik Lindberg, Sara Wernersson and Bodil Ström Holst.
Publication charges for this supplement were funded by the research platform Future Animal Health and Welfare, Swedish University of Agricultural Sciences. The articles have undergone the journal's standard peer review process for supplements. The Supplement Editors declare that they have no competing interests.