When chickens are in the incubation period or not fully healthy, it's not advisable to implement disease prevention measures. At this stage, the birds are just recovering from an illness, and their bodies haven't regained full functionality. To ensure better immunity, it's recommended to administer antiviral medication for 3 to 5 days prior to vaccination. Then, take a one-day break before proceeding with the actual disease prevention. This approach helps reduce stress on the birds and improves vaccine effectiveness.
It is important not to perform both vaccination and transportation at the same time. Combining these two stressful events can overwhelm the chickens, leading to weight loss instead of gain after moving them to a new group. In severe cases, many birds may refuse to eat, develop diarrhea, or even die due to excessive stress. Therefore, it’s best to wait 3 to 5 days after transporting the flock before carrying out any vaccinations.
Newcastle Disease I vaccine should not be mixed with other vaccines such as fowlpox vaccine. The Newcastle Disease I vaccine can strongly stimulate the production of anti-interferon in chickens, which significantly reduces the immune response to other vaccines administered simultaneously. This can lead to incomplete or failed immunity. To avoid this, it is recommended to space out the administration of these vaccines by at least one week.
Vaccinating chickens during the peak of egg production is not ideal. At this stage, hens undergo significant physiological changes, which weaken their immune system and make them more susceptible to diseases. Therefore, all vaccinations for laying hens should be done either before the onset of egg production or after the laying cycle has slowed down. This ensures that the birds are in a healthier state and can mount a stronger immune response to the vaccines.
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