I don't like him either. While he may know how to train a dog (although I don't think much of his pack is trained, they're just scared of the authority figure), he doesn't know how to physically care for a dog.

He does some very dangerous things on the show, and people are likely to do the same. He'll run a large dog to the brink of exhaustion (newfoundland picky eater episode) and then while the dog is panting heavily trying to cool off in the kiddie pool, he brings in a large meal for the dog!!! Does he want the dog to get sick or die? And then he tells the owners to do the same. I'll bet that dog has died of bloat since the episode.

He never gets dogs vet checked before starting them on immediate strenious exercise programs.

His dogs are never on leash when walking through neighborhoods with leashed dogs in training. Who watches to see if his dogs pooped in somebody's yard a few blocks back? Who watches his dogs as they mingle around in the middle of the road? What a moron.