Sometimes Flash is No Fun

I know that Flash knows what he is supposed to do: Retrieve and Bring Back. I worked with him in the back yard, mistakenly thinking I didn't need a leash. He chased the dumbbell and he brought it back ... almost all the way. But then he dropped it and came in for the cookie. We went through the Uh Ohs so he would go back and get the dumbbell and bring it all the way to me. This was work not play.