Adorable!!! I used to tell my female lab to be nice to her new little brother, she used to race past him barking and playing and he could never catch her. He used to chase after her with his teeth gnashing, trying to get to her but he couldn''t even get close. He was a tubby little puppy and she was leaner and fiesty. Now, he is a good 10kg (22 pounds) heavier than her, and he''s certainly the boss and she knows it. He has a funny habbit of thumping things with his paw (her included), he will just walk up and wack you if he wants to play. I am sure it''s payback from when they were little.