Abstrakt. Diagnostic monitoring in herds of cows is of great importance in maintaining an acceptable level of health and productivity in the cows and their progeny. It is one of the important elements of farm assurance and is necessary to demonstrate health and welfare in livestock. The aim of the study was to compare the values of selected blood parameters in four groups (breeds) of clinically healthy cows. The materials consisted of 42 lactating cows (Holstein Friesian group I – 17 dairy cows, Hereford group II – 10 beef cows, Simmental group III – 8 beef cows, Limousine group IV – 7 beef cows. Various selected blood parameters were included in the study (total protein, albumin, creatinine, cholesterol, GOT, GPT, calcium (Ca), magnesium (Mg), inorganic phosphorus (P), sodium (Na), potassium (K) and chloride (Cl). Significant differences were noted in total protein, albumin, chloride, sodium, GOT and calcium between the tested groups of cows. Detailed data and differences are presented in the paper.

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