After you ve reinforced that for a while, ask for a little more say, rolling onto his back. Gradually, you will get more and more of the behavior until you have all of it. This doesn t take long. In five or six five minute sessions, most dogs have the whole behavior on cue. Think about other tricks you might teach your dog.
Some dogs learn tricks more easily than others.
Learning tricks can keep a high-energy dog busy and provide the mental stimulation that smart dogs really need. Or at least on a music video.