It is important that you establish leadership with your pup, especially since he’s going to be a big boy quicker than you can imagine. As soon as you can, enroll him in an obedience class with a well-qualified trainer. To establish leadership, don’t play on the floor with your dog, give and take toys away, eat before you feed him, make him sit and stay for his dinner, go through doorways before him and make him move if he’s blocking your way.