What problems exist in the process of chicken immunization and medication?

With the development of the broiler farming industry, many farmers regard raising broilers as a way to get rich, but the following two major problems still exist in raising them.

(1) Blindly copying outdated immunization programs: many @#@230@#@ households immunize only once with Newcastle disease strain IV vaccine and do not immunize with any other vaccine until sale; some chicken farmers have infectious bursal disease of chickens in every flock, and the yolk fluid used for therapeutic injection contains Newcastle disease antibodies, thereby interfering with the immune effect of the Newcastle disease vaccine; in infectious bronchitis epidemic areas, the vast majority of chicken farmers do not use infectious bronchitis vaccine, all of which lead to the occurrence of infectious diseases in the flock and cause huge economic losses. Therefore, farmers should pay attention to flock immunization and require breeding chicken farms to provide information on the maternal antibodies of chicks, so as to determine the age of the first immunization of chicks against Newcastle disease and bursal disease. It is recommended that broiler chicks be immunized against Newcastle disease twice, with the first immunization at 7-9 days of age and the second at about 25 days of age, and the first immunization is best done by intranasal and eye drop methods. In areas with a high incidence of bursal disease, a moderately strong vaccine strain should be used for immunization at 14-16 days of age. In infectious bronchitis epidemic areas, at about 5-7 days of age, use infectious bronchitis H120 vaccine by intranasal and eye drop or drinking water immunization.

(2) Abuse of drugs Most chicken farmers use many drugs in a chaotic way, including traditional old drugs and new drugs. For example, when chicks show diarrhea symptoms, they feed large amounts of chloramphenicol, which often causes damage to the immune system; some chicken farms have just used probiotics and then immediately use antibiotics, resulting in the two canceling each other's efficacy. Arbitrary use of drugs, on the one hand, will inevitably increase drug costs, and on the other hand, it also affects the balance of intestinal flora, causes nutritional imbalance in broilers, and leads to poor growth and reduced disease resistance. Therefore, when using drugs, chicken farmers should first clarify which chicken diseases commonly occur in the local area and which drugs no longer have obvious effects in the local area, and screen out drugs suitable for the local area; second, they should observe carefully, analyze the cause seriously, diagnose early and administer drugs early, and it is best to prevent in advance.