Urea Nitrogen. (BUN) This is a test that measures the nitrogen in the blood. It indicates how well your kidneys are functioning. a high level can indicate poor kidney function as well as /or it can also indicate dehydration, and heart disease. A low level can indicate liver disease/failure. This test in combination with other blood tests are important in both diagnosis and treatments of disease.

medications, starvation, severe injury such as burns can also influence the BUN levels and should be evaluated as part of accessing an accurate diagnosis.

Zilla's Urea nitrogen results were just slightly higher than high normal. Those results by themselves are not necessarily significant since they are just slightly outside the normal range, however in conjunction with her other results, you can piece together a bigger picture. This is one reason why when a chemistry is run on an animal or a person, it is a combination of many different blood tests.