Theres two problems with these type of stories.
1) When I was attacked and recieved fairly good injuries ( scars on my arms and legs) from a german shepard and it was reported there was no news story or anything public. But when a Pitbull does it (with more or less damage) There's a news story because they're prerceived dangerous
2) There is no explaining what made the dog attack. The dog could of just snapped which is what everyone will assume and is also what the writer wants you to assume, but how do we know the owner wasn't out giving the dog it's daily beating to make it tougher and than the dog finally fought back?