[Zesavenue]

Well... I've done a pretty good job of raising mine and she listens well. But if we're out in the sticks where I can unleash her and she sees a squirrel before I do no guarantees she's not going to rocket after it. I can't train the prey drive out of her. If she really wants that squirrel she's gone and I'm chasing her.

Same thing can happen with a scrap between two dogs, your dog may not start it, you may have only looked away for a second, could be all kinds of things that "just happened" and instinct or temperament overrides your training. Your dog, first and foremost is a dog. Many of us may view our dog as a short four legged member of the family with a speech problem but it is still a dog. Since it is a dog, you don't know what it will do until it happens. You can claim you know how your dog will react all you want, the fact is until it happens you don't know.

How you raise them does matter, but is certainly isn't the be all end all of what your dog will do when pushed.