Monkey the cat is an indoor cat, but to give him the experience of hunting, his owner has trained him to 'hunt' plastic balls hidden around the house and place them as tokens in a mechanical feeder which then dispenses food. In this way, Monkey earns his dinner by following his instinctive behaviour.
Read more about how self-confessed 'cat geek' Benjamin Millam trained his cat here: http://benjaminmillam.com/cat-geek/monkey-the-cat-hunts-for-dinner/