Abstract
The analyzed population comprised 970 Polish holstein-friesian cows (PHF) and 372 Jersey cows. The database provided pedigree information on dams and their productivity. Differences between breeds in terms of longevity and culling reasons were investigated. For the group of PHF cows, the average age of culling was 5.2 years, while for Jersey cows, it was 4.81 years. In the PHF group, for the main cause of culling, about 39.5% of all cases, was classified as other, that is unspecified causes. In the group of Jersey cows, very similar levels were recorded for four culling reasons: sterility and reproductive system disfunction and infectious diseases; each at about 17%, low yields at 16.5% and metabolic disorders and diseases of the alimentary tract at 15.6%.
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