Reindeer have 28 teeth in their mouths. This includes 6 incisors on the top front, 6 incisors on the bottom front, 6 premolars on the top back, and 10 molars on the bottom back. The incisors are used for cutting and tearing vegetation, while the molars are used for grinding food. Reindeer also have sharp canine teeth used for fighting and defending against predators.