Your dog's breath offers important clues to his health status. He should have kissable breath from puppyhood to old age. If not, book an appointment with your veterinarian for a complete dental exam. Bad breath may signal periodontal disease or other health problems. "With each bite of food, your dog could be pumping bacteria into his bloodstream, where it can harm his heart, liver, and kidneys," cautions veterinarian Dr. Marty Becker, author of "The Healing Power of Pets." Prevent future problems by brushing your dog's teeth at least three times a week using toothpaste and a toothbrush designed for dogs. There are even "edible toothbrushes" at pet-supply stores that help remove surface tartar from teeth. Some dogs love a chew called Greenies that cleans their teeth, freshens their breath, and contains no preservatives or artificial flavors or colors. You can also serve whole baby carrots as daily treats. This root vegetable acts as a mild tooth scraper, scouring away stink-causing plaque.