Rabbits are the third most common mammalian pet in the United States. They make good pets because they generally are nonaggressive and are playful, active, and curious. They form strong social bonds, both with rabbits they live with in the household and with the humans who care for them. They have several behaviors derived from their wild counterparts that can cause problems, if not properly allowed for, or be beneficial, such as their proclivity to use a specific site for elimination.