Woffling, dogs can't lock their jaws, it's a myth.
Birds, no one is debating that the woman was an idiot and a dreadfully irresponsible pet owner. However, she states her and the dog were trying to get away from the knives. Was her dog attacking the other one and trying to get away at the same time?
It seems odd that this dog is even still in the owners possession given the 'hundreds' of complaints made though, don't you think?
I would do anything to protect my dogs, but I'm fairly sure I don't have it in me to stab another dog 23 times with a ten inch knife, or any other knife. Hit it, kick it, yes, phone the police, yes, make a loud noise, yes. Stab it, I really doubt it.
Incidentally Birds, you can buy compressed air to seperate fighting dogs. It makes a fairly loud, hissing noise that most dogs don't like and aren't used to.