В статье представлены результаты эксперимента по выявлению влияния использования зебувидных быков в селекционной работе на молочную продуктивность, устойчивость к заболеваниям и естественную резистентность коров. / The paper presents the results of an experiment identifying the impact of using Zebu-like bulls in breeding on dairy productivity, disease resistance and natural resistance of cows. Based on the experiment results, the authors have confirmed a hypothesis about the interrelationship between hybridization made by "enriching" milk breeds with the "blood" of Zebu and quantitative and qualitative indicators of food security: increased production of milk and improved qualitative characteristics of food products ??an increased mass fraction of milk fat and milk protein??, and increased level of immunological protection of animals.