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Purpose: estimation of the possibility of using a mixture of feed additive "BioGrom SC" and the food antibiotic "Monenzin" for normalizing metabolic processes in highly productive cows in the transit period.Materials and methods. Studies were conducted because of the tribal plant of the Leningrad region. Two groups of animals were selected on the principle of analogs (experimental and control) 20 goals in each. The experimental group of cows 21 days before the calving and for 14 days after the calves were given a mixture of feed additive "BioGrom SC" and the food antibiotic "Monenzin". For the cottage additives, calcium carbonate (chalk) was used as a filler in the amount of 250 g with the addition of 10-15 g. Supplements "BioGrom SC" by 1 head. The mixture was prepared at the rate of 20 goals and a food antibiotic "Monenzin" was added to it at the rate of 100 mg per 1 kg of a mixture of feed additive with filler. The resulting mixture was fed by animals of the experimental group. All animal experimental and control groups take blood for 21 days before the hotel. The total protein, beta hydroxy acid, acetoacetic acid, alkaline blood reserve, calcium-phosphoric ratio, glucose is determined. At the end of the transit period on the 21st day of lactation, the blood of animal control and experimental groups was repeatedly investigated.Results. In the cows of the experimental group, in comparison with the cows of the control group at the end of the transit period, a decrease in such biochemical indicators was observed as beta hydroxy acid (a decrease to 0.84 ± 0.03 mmol / l), acetoacetic acid (decrease to 0.4 ± 0, 04 mmol / l). The animals of the experimental group decreased the content of the general protein (77.0 ± 0.08 g / l). Also, the data of the backup alkalinity of blood (acidose indicator) are within reference values. Calcium phosphorus ratio was also within the normal range.Conclusion. Introduction to the diet of a mixture of feed additive "BioGrom SC" and food antibiotic "Monenzin" normalize some biochemical blood indicators in cows in the transit period. At the same time, without correction of metabolic processes, cows are observed ketosis and acidosis, which can lead to premature disposal of animals from herd and as a result of economic losses. Thus, the use of the mixture is shown for the prevention and treatment of acidosis of the scar, metabolic acidosis, ketosis in cattle of the dairy direction of productivity.