The reason why the immune effect of native chicken can not be guaranteed.

Chicken farmers failed to carry out immunization according to the immunization procedure, and the interval and frequency of immunization were arbitrary. In the immunization method, it is easy to use, and most of them are immunized with drinking water, so the epidemic prevention effect is not accurate.

Professional chicken farmers should introduce Miao chickens from large-scale chicken farms which are healthy and scientifically managed to ensure their quality. From the production practice, Ningdu Yellow Chicken, Wanzai Kangle Chicken, Yuganwu Black Chicken and Zhejiang Xianju Chicken are all excellent breeds of native chicken.