Attention should be paid to the selection of vaccines and immune methods in native chicken breeding.

The immunity of native chicken should be different from that of fast chicken raised indoors, mainly as follows: (1) choose the vaccine of reliable quality; (2) the vaccine should be used in sufficient quantity, and the amount of drinking water immunization should be doubled in the early stage (that is, 2000 feather vaccine for 1000 chickens). The amount of drip immunization should be 1 to 1.5 times, and 1.5 to 2 times in the later stage. (4) immune method: in the early stage, the immunization should be given by nose, eye or mouth, and in the later stage, injection should be used to ensure that the immunity is in place, the immune effect is true, and the deficiency of drinking water immunity can be avoided.