1. When the incubation period or the flock is not completely healthy, it is not appropriate to prevent the chicken disease group from getting sick just to restore health. The body's various functions have not yet fully recovered. It is recommended to use anti-virus medicine for 3 to 5 days before epidemic prevention, stop for 1 day, and then conduct epidemic prevention. The effect is good.
2. Transplantation and vaccination should not be carried out at the same time when the chicken is transferred to the group. This means that a large variety of stresses are added together to act on the body, resulting in a decrease in the body weight of the chickens. A considerable number of chickens have been hunger strikes, diarrhea, and even death due to stress. It is recommended that immunization be carried out 3 to 5 days after the colony.
3, Newcastle disease I vaccine and other vaccines such as fowlpox should not be mixed injection because the Newcastle disease virus vaccine series I can strongly induce the body to produce anti-interferon, so that at the same time vaccination with other vaccines immune effects greatly reduced, resulting in immune failure. It is recommended that Newcastle disease I vaccine and fowlpox vaccine be inoculated at intervals of 1 week.
4. It is not appropriate to vaccinate chickens at the rising egg production rate. This is because after the laying hens are put into production, due to a huge physiological reaction, the body defense function becomes very fragile and it is very easy to infect the disease. Therefore, all the immunization reactions to the hens were performed.
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