No one knows when/if a dog, any breed, will turn and attack anyone. It is called nature. It happens. Perfect training or not. You're dog may never harm a fly in it's entire life. But, in that same breath, he may attack 3 people tomorrow and kill them. Training does not determine a dog's natural instinct. Don't get me wrong, it helps. A lot, I know. But it is NEVER, NEVER definite. And anyone who thinks otherwise, seriously, is ignorant as hail. Later, QD.