The following methods can be used to treat bad breath in cats. First, oral problems can be improved by brushing teeth and drinking mouthwash. Or give the cat snacks such as tooth cleaning, or add oral care solution to the cat’s water. If conditions permit, the cat can be given a comprehensive dental cleaning and care; the second is an unbalanced diet. When feeding, it is enough to frequently change the type of cat food and supplement with appropriate amounts of vitamins; the third is indigestion. Usually, you should eat small meals frequently, and pet owners should choose prescription food that is easier to digest to feed their cats. In addition, you can give the cat some probiotics to regulate the gastrointestinal condition; fourth, if it is caused by disease, it is best to send it to a pet hospital for diagnosis and treatment as soon as possible.