The ears also keep the rabbit cool in hot weather by giving off heat. Rabbits' teeth grow continually throughout their lives. Their chisellike front teeth, the upper incisors and lower incisors, resemble those of rodents. Unlike rodents, rabbits have two pairs of upper incisors. One pair is directly behind the other.
Rabbits use the incisors to gnaw and clip off plants.
They then chew their food with sideways movements of the lower jaw, which grinds the food and helps wear down the ever-growing teeth. The life of a rabbit Rabbits have many natural enemies and can protect themselves mainly by hiding or running from danger. Although pet rabbits may live as long as 10 to 15 years, wild rabbits rarely survive beyond 6 years of age. Cottontail rabbits spend most of the daylight hours resting in shallow depressions in the ground called forms. In cold weather underneath deep snow, a cottontail may take over another wild animal's abandoned burrow and make a network of connected paths called runs.