Where does your lysine end up and what does it cost?

Increased protein costs and environmental concerns related to excessive nitrogen excretion have forced dairy nutritionists to alter ration formulation. However, they need to be aware of the limitations involved with feed ingredients related to ruminant protein nutrition. One method that is commonly used to influence nitrogen excretion, is to reduce the amount of protein supplied to the animal. The risk associated with this approach is that the protein, and more specifically the amino acid requi