The purpose of this study was to identify and evaluate cows with the “loaded metabolism” phenomenon. This study was performed on cows of black-and-white breed with a live weight of 620.3 ± 15.3 kg, aged 4–6 years. For the study, depending on the concentration of manganese in the fur, animals were divided into three groups: I – up to the 25th percentile, II – within the 25–75th centile interval, III – above the 75th percentile, calculated separately for each micropopulation. Cows showed an increase in chemical elements in the wool, depending on the percentile range of manganese concentration in the wool. Thus, with a high content of manganese, an increased content of macronutrients – calcium, sodium, and magnesium – was also observed. The results of an elemental analysis of the wool of black-and-white cows showed that the group of animals with a “loaded metabolism” also contains a higher content of almost all the elements studied.

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