Bad breath may be a sign that your cat or dog has a buildup of bacterial growth in the form of plaque, or possibly a more serious condition, such as gingivitis.
 
 
1.   Understand that brushing your cat's or dog's teeth is the best method for preventing bad breath and other dental problems. 
 
2.   Look for abscessed teeth and other dental problems while you're brushing, and have a veterinarian properly treat any such problems. 
 
3.   Consider offering your cat or dog mouthwash; some mouthwashes made for pets claim that they can deter dental tartar buildup. 
 
4.   Consider your pet's diet. Some soft canned foods are particular offenders when it comes to bad breath. Make sure your cat or dog eats dry food in addition to soft food, unless he is elderly and needs to eat soft food exclusively. 
 
5.   Be sure that your veterinarian includes a dental examination and cleaning as part of your pet's regular examinations. 
 
6.   Consider other possible causes of bad breath'such as gastrointestinal disease'if it persists in spite of clean teeth and proper food. Bring your pet to the veterinarian for a checkup. 
 
 

 Some pet foods are designed to help prevent tartar buildup and gum disease. Certain chew toys also can help prevent and remove tartar buildup.