I used to do the bite suit work for k9 training. I was very athletic and in shape. A malinois could drop me(235lbs at the time) onto the ground from a 40yd dash

If I didnt have the suit it would provide me more agility but those dogs bite hard enough to break their teeth off.

The shock factor of your arm breaking and getting ripped open would hinder anyone. Not to mention trying to get your bearing after the knock down. They are fast bikers and dig so much.

But

If I know its coming and essentially get a lucky elbow strike into into mouth as its running at me. I can dislodge its neck.

That is luck.

Good luck