The article presents the results of the use of activated zeolite "ZEOL" in feeding calves of the dairy and post-dairy period. It has been shown that the addition of activated zeolite to calves' diets at a dose of 0.5 g / kg of live weight does not adversely affect the physiological state, metabolism in the body and the health of young animals in general. In the calves of the experimental group, an increase in live weight (by 5.6%), a reduction in feed costs per kg of increase (by 5.3%), high economic efficiency of feeding activated zeolite by 1 rub. of additional costs were established.

The introduction of the experimental energy concentrate "Zeolfat" in doses of 200, 400 and 600 g/kg per day into the main diet of lactating cows allowed to increase the content of raw fat by 6.69%, 13.38% and 19.91%; exchange energy by 1.46; 2.92 and 4.37%, respectively. As a result, the increase in average daily milk yields in terms of (3.4%) basic fat content was 8.1% in the I  group with the introduction of 200 g of concentrate, in the II  (400 g) -13.7, in the III  (600 g) - 14.3% compared to the control. A positive effect on the biochemical parameters of blood serum characterizing carbohydrate-lipid and mineral metabolism in the body was established. Economic efficiency per 1 RUB of additional costs in the experimental groups was 2.83-5.53 RUB, respectively.

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