Dr2little, if we're thinking the same thing, that's why I intially was leaning towards pits having a stronger bite than your average dog.
From the inside there is a large mass of muscle in the cheeks. I was under the impression that it worked like any other muscle, contracted and pulled the joint tight (jaw). If there was more muscle that would make the closing action stronger/faster. Hades and Roxy have very different mouths. Roxy does not have in any way shape or form, the ball that Hades has on either side of his cheeks from the inside. It's about 2inces in diameter, and you can grab it from the outside easily and rub it, it feels just like a muscle, and a ball at the same time. LOL
From the inside there is a large mass of muscle in the cheeks. I was under the impression that it worked like any other muscle, contracted and pulled the joint tight (jaw). If there was more muscle that would make the closing action stronger/faster. Hades and Roxy have very different mouths. Roxy does not have in any way shape or form, the ball that Hades has on either side of his cheeks from the inside. It's about 2inces in diameter, and you can grab it from the outside easily and rub it, it feels just like a muscle, and a ball at the same time. LOL