Dog-powered bicycle scooter

Use the power of a running dog to pull your bike or scooter. It's kind of a weird idea, but for large dogs who seem to run endlessly everyday, it might be a good idea. Finally you can let it rest. You can also let it pull you to buy some groceries. Your bike won't get stolen. But this idea is only suitable for cities with flat roads and large dogs. Imagine finding a Chihuahua pulling you around on the streets in the Himalayan region - that would be cruel.