Effect of copper on the milk quality and prevention of mastitis in dairy cows

To study the effect of copper on milk quality and prevention of mastitis, copper glycinate (75mg/ml) @ 2 ml/ animal was given subcutaneously in the brisket region, first before drying off followed by second injection at the same dose rate after parturition. Plasma and milk copper levels, and milk parameters, viz. bacteriology, CMT, EC, fat, SNF, total protein, lactose, density and pH were studied. A reduction in occurrence of postpartum mastitis in supplemented cows (50%) than unsupplemented control (70%) was seen. A slightly less marked increase in plasma copper and higher increase in milk copper levels and consistent increase in milk fat content was recorded in supplemented cows as compared to unsupplemented dairy cows.