Groomit post author: Mike Powel

Quick answer: The most common cause of bad breath in dogs is dental disease: plaque and tartar build up on the teeth, bacteria multiply, and the gums become inflamed. Other causes include something your dog ate, a foreign object in the mouth, or, less often, problems such as kidney disease, diabetes or liver disease. Daily tooth brushing, dental chews and regular vet dental checks prevent most cases. Sudden or very ...