Funding for this research was provided by:
the Key Project of Modern Agriculture Techniques in Changsha (k1401005-21)
Received: 13 December 2018
Accepted: 1 January 2021
First Online: 19 January 2021
Ethics approval and consent to participate
: This survey was part of <i>the national surveillance plan for major animal diseases, 2015</i>, and all the activities follow the ethics requirement of the plan. The purpose of the study was introduced to the participants and response to the questionnaire was voluntary. The owners gave their written consent to participate.
: Not applicable.