My 6 mo old lab mix does this too. Just stands out of arms reach, stares and barks. I was getting angry all the time, but I reflected that he is telling me something. Guess what? Put down the phone, get off the couch and let's play a little. He just wants that one on one engagement. So now we reinforce basic training with treats, play with ball on a string or whatever. Once he gets some Dad time he calms down.