Cats can get plaque on their teeth, which is formed by saliva, bacteria, and food particles. If not taken care of, the plaque can quickly turn to tartar—a hard, yellowish deposit on the teeth. Plaque can also cause gingivitis, a gum infection that is the first stage of periodontal disease. Some veterinary experts estimate that as many as 70 percent of cats have periodontal disease by the time they turn two years old. Fortunately, some treats can serve as a teeth cleaning mechanism for cats to help avoid such dental problems. By keeping the plaque cleaned up, dental treats help avoid tartar. When used regularly, some dental treats can help ensure your cat has healthy teeth for years to come.