The additive pre-mixed feed refers to a feed that is mainly composed of two or more nutritional feed additives and is formulated with a carrier or a diluent in a certain proportion, including compound pre-mixed feed and trace element pre-mixed feed. Vitamin premix feed. Compound premixed feeds refer to any two or more nutritive feed additives based on mineral elements such as trace elements, vitamins, and amino acids, and are uniformly formulated with other feed additives, carriers, and (or) diluents in a certain proportion. The mixture, wherein the content of the nutritive feed additive can meet the basic nutritional needs of the animal at a specific physiological stage, the amount added in the compound feed, concentrate supplement or animal drinking water is not less than 0.1% and not more than 10%. Trace element premixed feed refers to a uniform mixture of two or more mineral trace elements and carriers and (or) diluents formulated in a certain proportion, in which trace element content of minerals can meet the micro-amount of micro-elements applicable to specific physiological stages of animals. The elemental demand shall not be less than 0.1% and not more than 10% in compound feed, concentrate supplements or animal drinking water. Vitamin premixed feed refers to a homogeneous mixture of two or more vitamins and carriers and (or) diluents formulated in a certain proportion, in which the vitamin content should meet the vitamin requirements for the specific physiological stage of the animal in which it is applied. Additives in feed supplements or animal drinking water should be no less than 0.01% and no more than 10%.

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