This study aimed to evaluate several biochemical changes in dairy cows during the periparturient period. It was carried out on 38 multiparous Holstein/Friesian crossbreed dairy cows 3-11 years old. On the basis of clinical examination and assessment of BHBA concentration in blood, cows were classified to 4 groups, control healthy cows include 16 animals, subclinical ketosis include 10 animals, cows ...
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