1. The feed additive product used in the feed shall be the one produced by the enterprise that has obtained the production license of the feed additive product and has obtained the product approval document number. 2, sensory requirements: the species should have the color, smell, taste and organizational morphology characteristics, no smell, different smell. 3. The use of feed additives should be used in accordance with the usage and dosage specified in the product feed label. 4. The allowable amount of harmful substances and microorganisms shall meet the requirements of GB 13078 and related standards. 5. During the laying period and before the start of production, drug feed additives should not be used in the weekly chicken feed (except for special provisions in Chinese herbal medicine). 6. The nutritive feed additives and general feed additive products used in the feed shall be the species specified in Appendix A and the new feed additives allowed by the Ministry of Agriculture. Irrigation Bag,High Quality Irrigation Bag,Irrigation Bag Details, CN K-MED Co., Ltd. , https://www.kmedasia.com