1. In the hot summer, 2% more vitamin C should be added to the chicken feed to improve the disease resistance of the chicken body, lower the temperature of the chicken body, improve the production performance and reduce the stress response. 2. During the peak of egg laying, the laying hen should add 2% more vitamin B2; in order to increase the hardness of the eggshell, in addition to adding 2% more calcium in the feed, 2% more vitamin A should be added. C. 3. When the flock has a stress response (such as vaccination, transfer, etc.), add 10% more vitamins A, E, D, C. 4. When the chickens have chronic diseases (such as chronic respiratory diseases), you should also add 10% more vitamins A, E, and C. 5. For chicks, the lower the vitamin A content in the feed, the higher the incidence of coccidiosis in the chicken. Therefore, when the chicken is suffering from coccidiosis, 20% of vitamin A, K, and C should be added to the feed. 6. When the chickens have white sputum and coccidiosis, double the amount of multivitamin in the feed. 7. When a certain vitamin deficiency occurs in a flock, the amount of vitamin added to the feed should be three times the constant. 8. When the chicken suffers from fatty liver syndrome, add 5% choline chloride and 10% multivitamin. 9. If the feed is used for too long (more than one month), add 5% to 10% more multivitamin to make up for the loss of vitamins. 10. The amount of vitamins added to the feed of young chickens and breeders should be doubled. 11. In general, caged chickens are supplemented with 10% more multivitamins than stocks of free-range chickens. kaiping aida sanitary ware technology co.,ltd , https://www.kpfaucets.com