Received: 26 September 2018
Accepted: 26 June 2019
First Online: 9 July 2019
Ethics approval and consent to participate
: This study was approved by an ethical review committee (Lower Saxony State Office for Consumer Protection and Food Safety (LAVES), 33.9–42502-05-14A484) and written consent from the dog owners was obtained.
: Publication of the dogs’ data in anonymised form was approved by all owners.
: The authors declare that they have no competing interests.