Bad Breath

Bad breath becomes more common as dogs and cats age. It is caused by a number of factors, including:

  1. Periodontal disease (bad teeth)
  2. Gingivitis (especially in cats)
  3. Poor digestion
  4. Stomach problems
  5. Chronic small intestinal problems
  6. Poor diet

A veterinarian should examine all animals with halitosis. Teeth should be cleaned if needed. The diet should be modified to improve the quality of the food (see the articles on Feeding Your Cat or feeding your dog).

Severe disease involving kidneys, adrenal glands, liver or other organs can cause foul mouth odors. Blood tests would be needed to determine if this is the problem. Animals that eat feces (coprophagia) will have bad breath. Animals that are in the habit of scavenging for garbage and foul-tasting plants may develop bad breath, and those that eat indigestible items (sticks, plastic, rubber, etc.) can have bad breath.

Most dogs and cats with halitosis have poor digestion, abnormal bacterial populations in the stomach and small intestines, and often have a slow passage of food out of the stomach.

Some dogs and cats with bad breath might need radiographs and perhaps endoscopic examination (scoping the stomach) to help determine the problem.

However, most dogs and cats with bad breath do not improve with dental treatments and don't have systemic diseases. The mouth odor is coming from the stomach and esophagus. Food is not being adequately digested, moving too slowly through the digestive tract, and abnormal bacteria are growing because of this "slugging" of food.

Many animals are given products that mask the odor. We believe that this only hides the symptoms of maldigestion and dysbiosis (abnormal bacteria populations). We recommend that you try to improve digestion, detoxification, and nutrition as primary ways to improve mouth odor.

If the bad breath persists after the veterinary exam and treatment, consider doing the following:

  1. Change the diet to a more healthy one
  2. Supplement the diet with:
  3. a. Plant-based digestive enzymes - digestive enzymes are often very helpful and must be given between meals to work

    b. Probiotic - beneficial bacteria improve normal bacterial populations, and a probiotic could be helpful with some dogs and cats

    c. Garlic - aids in digestion and has a healing, beneficial effect on the stomach lining

    d. Aloe vera - heals the mucosal lining of the stomach; read about Aloe Vera in our article

    e. Myrrh

  4. Chinese herbal medicine - often, Chinese herbs can heal the abnormal digestive system. Each animal must be individually analyzed for the correct formula.
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