Assessment of the physiological and biochemical status of imported Holstein cattle and its correction of an energy-protein supplement

In this regard, scientific, industrial and laboratory studies were carried out on heifers (15 animals) and heifers, divided into three groups of 10 animals each. The research results showed that the developed feed additive for highly productive dairy cows with a protected protein and available energy favorably affects the basic hematological parameters and mineral metabolism of animals, and also allows to increase the average daily milk yield of heifers.