I used to have a husky/German Shepard/golden mix, a real sweetie, 100 pounds of love. She lived to age 14, a good age for a dog that big. She was gentle with people but an alpha dog at the dog park. A neighbor's dog got out and came running into our yard. She was pretty old by then and had had surgery the day before, so I was worried. She struggled to her feet, then patiently waited, when mad Max ran into her, she just chest butted him, he was knocked ass over tea kettle and went home with his tail between his legs. I still miss that mutt.
I like the Dog Wisperer too. It always amazes me when he can take an out of control dog and make him instantly obey. It usually the owners that need retraining, not the dog. You have to be a good pack leader. Dogs want someone to be in charge, if you aren't, they will take control.