However, it's a myth that pit bulls have locking jaws.
Cesar Millan (A.K.A. The Dog WHisperer) quote:
“Yeah, but this is a different breed…the power that comes behind the bull dog, pit bull, presa canario, the fighting breed – They have an extra boost, they can go into a zone, they don’t feel the pain anymore. … So if you are trying to create submission in a fighting breed, it’s not going to happen.
They would rather die than surrender. If you add pain, it only infuriates them…to them pain is that adrenaline rush, they are looking forward to that, they are addicted to it… That’s why they are such great fighters.”
He goes on to say: “Especially with fighting breeds, you’re going to have these explosions over and over because there’s no limits in their brain.” Wow, is that what you want in a pet? A dog that has “explosions over and over” in its brain?
Of course they don’t have locking jaws. But they won’t release their bite and are strong enough it cannot be forced open.