Cat Bun Levels Chart: Understanding Your Cat's Health

cat bun levels chart

Greetings, fellow cat owners! As pet owners, we always want to ensure that our furry friends are healthy and happy. One way to monitor their health is by paying attention to their bun (blood urea nitrogen) levels. In this article, we will discuss everything you need to know about cat bun levels and how to interpret them.

What are Cat Bun Levels?

Cat bun levels are the measurement of the amount of nitrogen in your cat's blood. BUN levels are a way to gauge how well your cat's kidneys are functioning. High levels of BUN in the bloodstream can indicate that your cat's kidneys are not functioning properly. On the other hand, low levels of BUN can indicate that your cat is dehydrated or malnourished.

Interpreting Cat Bun Levels

Normal cat bun levels typically range from 10 to 30 mg/dL. However, it's important to note that the normal range can vary depending on your cat's age, breed, and overall health. If your cat's bun levels are above or below the normal range, it's best to consult with your veterinarian to determine the underlying cause.

Causes of High Cat Bun Levels

  1. Dehydration


    When your cat is dehydrated, their body will conserve water by producing less urine, leading to a buildup of nitrogen in the blood.

  2. Kidney Disease

    Kidney Disease

    Chronic kidney disease is a common cause of high cat bun levels. The disease damages the kidneys, leading to an inability to filter waste products from the blood effectively.

  3. Urinary Tract Obstruction

    Urinary Tract Obstruction

    An obstruction in the urinary tract can cause a buildup of nitrogen in the blood. This can be caused by bladder stones, tumors, or other blockages.

  4. High Protein Diet

    High Protein Diet

    Feeding your cat a diet that's high in protein can lead to high cat bun levels. This is because protein is broken down into nitrogen waste products that the kidneys need to filter out.

Causes of Low Cat Bun Levels

  1. Malnutrition


    If your cat isn't getting enough protein in their diet, their bun levels may be low. This is because there isn't enough protein to produce nitrogen waste products.

  2. Overhydration


    Overhydration can dilute your cat's urine, leading to lower bun levels in the blood.

  3. Liver Disease

    Liver Disease

    Liver disease can cause low bun levels in cats. This is because the liver is responsible for producing urea, which is a component of bun.

Frequently Asked Questions

  • What is a normal bun level for a cat?
    Normal cat bun levels typically range from 10 to 30 mg/dL.
  • How often should I monitor my cat's bun levels?
    Your veterinarian will advise you on how often your cat's bun levels should be monitored. This can vary depending on your cat's health and any underlying conditions.
  • How can I lower my cat's bun levels?
    The best way to lower your cat's bun levels is by addressing the underlying cause. This may involve changing their diet, providing hydration, or treating an underlying medical condition.
  • Can bun levels indicate cancer in cats?
    High bun levels can be a sign of cancer in cats. However, it's important to note that there are other possible causes of high bun levels as well.

Tips for Maintaining Your Cat's Health

To ensure that your cat's bun levels remain within the normal range, make sure to provide them with a balanced diet, plenty of fresh water, and regular veterinary check-ups. Keeping your cat healthy and happy is key to their overall well-being.


Monitoring your cat's bun levels is an important part of maintaining their health. By understanding what bun levels are and how to interpret them, you can ensure that your furry friend is healthy and happy for years to come.

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