This is what they eventually do, they have it in their genes. They are most happy when killing and mauling. I am just surprised they got this dog off of her so easily, usually pipes, tazers, pepper spray, and poles don't do it. They do it without being provoked, and they do it without warning, tails wagging the whole time. They can also pass a temperament test immediately after. These things kill someone every 11 days in the USA alone and they kill thousands of animals (Other dogs, cats, etc). These are NOT pets, your childs life is NOT worth it, and you can not love and train this trait out of them. You can go years without incident but they are ticking time bombs. I can't imagine how children have suffered being ripped to shreds alive. Thank God she is okay, should have put a bullet in its brain.
