In modern dairy production, postpartum hypocalcemia is widespread. Because fetal growth, calving and postpartum lactation consume a lot of calcium, and the utilization mechanism of postpartum calcium can not meet the needs of postpartum high calcium, resulting in postpartum hypocalcemia. The consequences of hypocalcemia are puerperal fever, mastitis, ketonemia, dystocia, placental retention, uterine prolapse, metritis, abomasum displacement and other common metabolic diseases, which are collectively called perinatal diseases of dairy cows. Resulting in reduced milk production and shortened milk production life.

Adding anionic salts in perinatal period can effectively solve the problem of low blood calcium in dairy cows after delivery and reduce the occurrence of perinatal diseases in dairy cows. The common anionic salt is a chemical preparation, which tastes bitter and palatable, and the intake of dairy cows is less after use, which aggravates the symptoms of perinatal diseases of dairy cows. Baoyukang is an anionic salt imported from the United States, which has good palatability and rich nutrition, and is an ideal choice for anionic salts of perinatal cows.