Funding for this research was provided by:
National Basic Research Program of China (973 Program) (2016YFC1202000)
Received: 6 February 2020
Accepted: 28 July 2020
First Online: 17 August 2020
Ethics approval and consent to participate
: The present study was approved by the Animal Ethics Committee of the Lanzhou Veterinary Research Institute, Academy of Agricultural Sciences (CAAS) (Permit No. LVRIAEC-2018-001). All the procedures were conducted according to the Animal Ethics Procedures and Guidelines of the People’s Republic of China.Each of the pets’ owners wrote consent and consented to this study.
: Not applicable.
: The authors declare that they have no competing interests.