Same with me! I had 2 black labs, shadow and jackson(they are both gone now ) and jackson was, well still VERY hyper because the breed is, but he would completely mellow out after a minute or so, and my other lab shadow didnt even calm down at 8-9 years old, he was always wired!! lol So it's definatly just the personality, alot of people lable dogs, like labs=hyper, rottweilers=visious, but they are actually like people, no matter where they come from and all that, they still have their own feelings and personailtys