Milk Urea Nitrogen (MUN)
Milk processing plants and DHI can provide dairy managers with milk urea nitrogen (MUN) values on bulk milk and individual cow milk samples. MUN tests are useful tools that can allow the dairy managers to monitor changes in the feeding and management of their herd. Milk urea nitrogen is the fraction of milk protein that is derived from blood urea nitrogen (BUN). In Holstein’s MUN normally represents about 0.19 percentage points of the normal 3.2% total milk protein.