One should never hit this dog in anger, as they may respond to aggressive behavior on your part with aggression of their own, or become so upset that they may refuse to work with you. It is usually recommended that this breed not be trained for protection sports or as an attack dog, for several reasons. First, the breed already has natural guardian instincts, and is very discriminating in determining real' vs. fake' threats. Dog digs moonscape into the landscaping. Dog too stubborn.
Training makes the owner angry with the dog.
Barks too much, especially at night. Fights with other dogs. Spouse, kids or housemates are scared of dog or allergic. No time to train or made too many training mistakes, no longer able to control dog. Boredom destruction such as dog chews things up.