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The aim of this study was to investigate the relationships among milk urea, blood plasmaurea, milk yield and body condition score (BCS) in primiparous goats fed at pasture. Ninetygoats of Sarda breed were used and, on the basis of their yield level, divided in three groupsof 30 animals each, low (LY), intermediate (IY) and high milk yield (HY). Daily milk yield, milkprotein content, milk urea, plasma total protein and albumin, plasma urea and BCS weremeasured at monthly intervals from 45 days in milking (45 DIM) to 165 DIM. Milk yield levelaffected protein concentration of milk and plasma, whereas albumin showed no variation.Plasma and milk urea showed a high correlation (<i>P</i><0.001) despite of the yield level; plasmaurea was always lower than milk urea. BCS decreased on 75 DIM and again after 135 DIM, andit was not affected by the milk yield level. Because milk urea and plasma urea were closelycorrelated and not influenced by the yield level, the study pointed out that measurement ofmilk urea could be utilized to evaluate urea metabolism also for browsing goats

Relationship between milk urea, blood plasma urea and body condition score in primiparous browsing goats with different milk yield level