Some of his methods are very questionable and inhumae, not to mention outdated.
The American Humane Society actually begs the public not to train their dogs the way Cesar does, because not only is it dangerous; but it can hurt the dog.
In one episode, a crazy dog (I think it was a terrier) wouldn't calm down; so he put it on the floor and used pressed knee against its neck to stop blood flow. This caused the dog to pass out... and therefore, calming down and solving the problem.
I later heard that this impaced the dog's brain after the show ended, much to the thrill of the dog's owners.
Also... his methods have been used for years. The only reason hes so big is because he has turned it into a show. The big picture hes trying to put down? That you're the alpha. Thats it. All Cesar tries to show is that if you show you're dog who is in charge, he will listen. Sometimes this includes inhumane ways of staking your authority and even animal abuse (such as hitting a dog if he doesn't listen, punishing him for retaliating, etc.)
Possitive reinforcement works MUCH better and is in no way abusive. Eventually the dog will learn to love you as a best friend instead of an alpha, which will create a much better relationship for years to come.
People who have attempted Cesar's training methods have injured their dogs or injured themselves since some of the crazier, more aggressive dogs retaliated. I don't know if I can trust Cesar... especially since its TV. I mean, how long does it REALLY take for him to train devils into angels? Also, how do you know for sure if its the same dog? What happens to the family after he leaves?
Keep in mind that the American Humane Society, a wonderful organization, is telling people NOT to listen to this Dog Whisperer fellow. Why on earth would they tell people that if there was nothing to worry about?
So, is Cesar Millan as much of a miracle worker as the public credits him for after all?