Funding for this research was provided by:
Bundesanstalt für Landwirtschaft und Ernährung (2817905315)
Received: 27 May 2020
Accepted: 12 June 2020
First Online: 12 August 2020
Ethics approval and consent to participate
: All of the animals were housed in accordance with EU (European Directive 2008/120/EC) and German law (Animal Protection Law, Animal Protection Livestock Regulation (Tierschutzgesetz, Tierschutz-Nutztierhaltungsverordnung)). In compliance with European Directive 2010/63/EC Article 1 5. (f), the present study did not imply any invasive procedure or treatment to the animals. The authors declare that the study was in accordance with current German law. This study was reviewed and received approval from the Animal Welfare Officer of the University of Veterinary Medicine Hannover, Foundation, Germany (TVO-2018-V-8).
: Not applicable.
: Henning Meyer and Heiko Plate were employed by VzF GmbH. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.