Анотация: To evaluate rumenocentesis as a diagnostic tool in routine veterinary practice and its effects on the health of sampled cows, a total of 196 ruminal fl uid samples were drawn by rumenocentesis from 10 dairy herds. Puncture site alterations and clinical status of the sampled cows were evaluated 4 and 7 days following rumenocentesis, respectively. A small local reaction and abscess formation were observed in 24 (12.24 percentage) and 1 (0.5 percentage) of the sampled cows, respectively. No case of haematomas formation or general health impairment was observed