Rabbits have incisors plus molars in the back of the mouth for grinding and chewing. Rabbits also have two small, tube-shaped incisors (peg teeth) behind the large upper incisors. Since the teeth continuously grow, the upper teeth must meet the lower teeth to allow for proper wearing of tooth surfaces, preventing overgrowth. All teeth must meet and wear at the same rate as they are growing, or improper tooth wear and overgrowth of the incisors and/or molars can occur. Overgrown teeth can cause many problems and lead to pain and infection. Rabbits with chronic dental problems need regular veterinary care. Feeding rabbits a diet of mainly high-fiber hay to promote chewing and teeth wear may help reduce the development of dental problems.