Shell powder not only contains a lot of calcium, but also the necessary trace elements contained in livestock and poultry body, phosphorus, manganese, zinc, copper, iron, potassium, magnesium, etc.Thus with shell powder as feed additive, not only can promote the growth of livestock and poultry bones, blood, circulation, but also can increase the production of eggs, milk and improve its quality, special shell powder is added in the chicken feed can significantly improve the quality of eggshell, improve the rate.1% of shell powder is added in the pig feed, not only can satisfy the pig growth necessary calcium, phosphorus and other trace elements, but also can make a good pig peaceful sleep, fatten up.