Funding for this research was provided by:
Received: 8 June 2020
Accepted: 29 November 2020
First Online: 7 December 2020
Ethics approval and consent to participate
: An application for permission of this pilot project was submitted to the Lower Saxony State Office for Consumer Protection and Food Safety (LAVES), Hannover, Germany in accordance with §8 (1) of the German Animal Health and Welfare Act and approved under the permit number 33.12-42502-04-15/2053.
: Not applicable.
: The authors declare that they have no competing interests.