Kidney Failure Bun Levels In Dogs. When the level of these wastes increases that shows the kidneys are unable to perform their duty. Normal bun levels in dogs seldom reach higher that 25 to 30 mg dl.

A sudden increase in creatinine and blood urea nitrogen bun to above normal levels point to acute renal failure. Most commonly these levels are associated with the kidneys and can indicate that your dog is experiencing kidney disease or even kidney failure. A dog in compensated chronic kidney failure with marginal kidney function may have normal levels of bun and creatinine but will have a low urine specific gravity.
If your dog s creatinine and urine specific gravity are normal your dog does not have kidney disease.
If your dog s creatinine and urine specific gravity are normal your dog does not have kidney disease. A sudden increase in creatinine and blood urea nitrogen bun to above normal levels point to acute renal failure. Mostly veterinarians suggest different types of tests to measure the level of waste and if test is positive then your dog is suffering from kidney failure. If a major stress such as illness or surgery occurs the kidneys may fail sending the blood test values up quickly.