Abstract: A pig feeding method for reducing pig back-fat thickness and/or improving lean meat percentage, a composition, and use thereof in preparing pig feed fall within the field of feed, and the technical problem to be solved is to reduce the back-fat thickness of fattening pigs. By adding additives including butyrate or butyrate derivatives, and omega 3 fatty acids during pig feeding, the back-fat thickness of the pig can be effectively reduced, which is important for improving pork quality.

Abstract: A novel sodium butyrate particle and a preparation method therefor. The sodium butyrate particle has an onion-like layered structure, the layered structure is compact and cannot be peeled off, and the sodium butyrate particle has a spheroid-like appearance. The sodium butyrate particle also has a grape-bunch-like structure integrally formed by agglomeration, aggregation and bonding of small and medium-sized particles. Sodium butyrate particles can be effectively and uniformly dispersed in feed, and are not easy to settle during storage and transportation, so that the service efficiency is effectively improved.

Abstract: Disclosed is a feed composition, a preparation method therefor, and an application thereof in raising animals. The composition includes a polyglycerol fatty acid ester having a pH value of 2.5-3.5. The fatty acid has 6-14 carbon atoms and is exemplified as laurel acid, caproic acid, caprylic acid, capric acid, or myristic acid. The number of polyglycerol molecules in the polyglycerol fatty acid ester is 1-5.