A robotic pet is an artificially intelligent machine made in the image of an animal commonly kept as a pet. So far, these animals include dogs, cats, rabbits, and birds. Some people even treat these robots as actual pets. Robotic pets may also include things not normally considered pets, like Pleo, a simulation robotic dinosaur. Some people treat domestic robots such as the Roomba as pets. They keep elderly people from being depressed and also keep them active.