My Lab is a year old and he's been with me almost continuously since he was 8 weeks. I know very little about training a dog, but he knows he's done wrong when I raise my voice at him. He hangs his head and droops his ears so much that I don't have the heart to be any rougher than that with him.
My biggest problem with him is that he's just so excitable. Not all the time, but he goes off when people come to visit. I've had to rap him on the head with my knuckles over that a few times. He weighs a lean 75 lbs and I've worked him out until he's strong as a pony. He's taken off to go "welcome" a visitor on occasion when on a leash and damn near pulled me off my feet.
That's when he gets the knuckles on the head. He's usually so worked up on those occasions that he just looks at me like "what?"
