I've seen the video where to the tosa inu has a bite force of 556 but that's just one dog, people say some mastiffs bite with a bite force of 650 which I think I just overall nonsense, if a wolf can't do it, doubt a dog can. A wolfs skull is larger than that of a dogs, when two skulls were matched one a Neapolitan mastiffs skull one a wolfs skull, the wolves was slightly larger, and quite a bit longer.