I agree that obedience training with a lot of positive reinforcement will teach him that you are the alpha in the house and that he does not need to protect you. Right now he is feeling that he runs things in your house. He thinks he has to take charge of situations. Once you become the teacher he will realize that you don't need his protection and he will stop the aggressive behavior.
Lots of exercise is always important for a dog to be well balanced in his temperament. |