نبذة مختصرة : The article presents the results of the effect of the feed additive Protein containing bacteria strains Bacillus subtilis, Saccharomyces the dynamics of growth and cerevisiae, Trichoderma development of foals. As a result of the conducted studies, it was found that the feed additive has a positive effect on the body of foals whose mothers received ProVetin during foaling. The weight of foals of the experimental group at birth was 6.7% higher compared to the control group. Further introduction of a feed additive into the diet of foals in the postnatal period also had a beneficial effect, which contributed to higher growth rates – at the age of 3 months, the live weight of the experimental group of foals receiving daily feed additive was 6.3% greater than in the control group; at 6 months – 6.5% more.
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