Funding for this research was provided by:
National Key Research and Development Program of China (2017YFD0501301)
National Key Basic Research Program (973 Program) of China (2015CB150300)
Gansu Provincial Key Science and Technology Projects (1203NKDA039)
Science Fund for Creative Research Groups of Gansu Province (1210RJIA006)
Central Public-interest Scientific Institution Basal Research Fund (1610312017001)
Central Public-interest Scientific Institution Basal Research Fund, Chinese Academy of Fishery Sciences (1610312016012)
Received: 18 January 2019
Accepted: 26 September 2019
First Online: 16 October 2019
Ethics approval and consent to participate
: Dogs used in this study were handled in strict accordance with good animal practice according to the animal ethics procedures and guidelines for animal husbandry and wildlife protection. The study was approved by the Animal Ethics Committee of Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences (No. LVRIAEC2012–007).
: Not applicable.
: The authors declare that they have no competing interests.