Received: 25 August 2020
Accepted: 24 November 2020
First Online: 4 December 2020
Ethics approval and consent to participate
: These studies were approved by the relevant Clinical governance committees and were undertaken in compliance with the Animals (Scientific Procedures) Act 1986 under a UK Home Office Licence, or other local regulations, as appropriate. In the field studies, informed owner consent was obtained prior to initiation at each farm and a test permit was granted by local agencies.
: The authors confirm that they have no personal undeclared competing interests.