Authors
Nina Volkmann
nina.volkmann@tiho-hannover.de
Institute for Animal Hygiene, Animal Welfare and Animal Behaviour, University of Veterinary Medicine Hannover, Hannover, Germany
Nicole Kemper
Institute for Animal Hygiene, Animal Welfare and Animal Behaviour, University of Veterinary Medicine Hannover, Hannover, Germany
Anke Römer
Institute of Livestock Farming, Mecklenburg-Vorpommern Research Center for Agriculture and Fisheries, Dummerstorf, Germany