BACKGROUND The supplementation of fat to lactating dairy cows has long been used as a management tool to increase dietary energy density for improving cow production, reproduction and to alleviate negative energy balance. Attempts have been made to investigate the effect of canola meal on plasma metabolites in lactating cows, but the results have been diverse and inconsistent. To our current kn...

Introduction Investigating and comparing the two systems Comparing some technical efficiency ratios and profit Points to note about the comparison Conclusions References Abstract. In this study, budgets of herd dynamics, feed and energy supply, production and profit of alternative dairy farm systems were used to examine the effects of changing a 230 cow Holstein-Friesian (HF) dairy system to a ...

In this paper an outbreak of mastitis in cows resistant to antibiotic treatment on a Holstein-Friesian cattle farm in Vojvodina (Serbia and Montenegro) was described. Microbiological examination of 73 milk samples from lactating cows revealed the presence of Prototheca zopfii in 22 samples (30.13%). Identification of the isolates was performed on the basis of growth features, microscopic appear...

Freemartinism in a 3.5 months-old Holstein Friesian calf was investigated. External examination of the animal revealed the presence of two vulvar openings ventral to the anus. The urine is voided from the lower aperture. Transrectal palpation and ultrasonography revealed an ectopic left kidney in the caudal abdomen. At autopsy, an ectopic left kidney, right unilateral cryptorchidism, left testi...

a comparative study on the effect of erythromycin and ivermectin on abomasal emptying in holstein-friesian calves motilides namely erythromycin have a great ability to increase abomasal emptying rate. the aim of this study was to evaluate the abomasal emptying rate in calves receiving either erythromycin or ivermectin. five male holstein-friesian calves were given each of the following 4 treatm...

A male Holstein Friesian calf affected with superior cervical ectopia cordis was examined macroscopically and histologically to assess the severity and elucidate other anomalies. This calf died 10 minutes after birth. The heart was round, weighed 380gm, was enveloped in the pericardium, and situated in the swollen part of the ventrocervical region underneath the skin. Inside the spacious perica...