Protein in cow diets: 
Not as simple as it seems

The efficiency with which protein is captured in milk by the dairy cow is staggeringly low. Optimising the dairy cow’s use of dietary protein would decrease associated cost for producers and minimise the environmental impact of dairy farms. Although a costly ingredient, there is great potential for manipulation of amino acid supply in dairy cow rations to increase output of milk and protein yields. Great research attention has been devoted to manipulating the efficiency of milk production