I get what you guys are all saying, a dog needs the natural urge to guard BUT needs this natural talent nuturing and homing. A good level of obedience is a must and i NEVER trained a dog for serious bitework unless it was also very well obedience trained. In this day and age you MUST have a well trained dog, if a dog is about to bite someone a solid recall is a must, especially if its a mistake and the dog may bite the wrong person..........