Rottweillers and Mastiffs I think have the most bite force. We're talking very large heads. If you've seen how hard they have to hit the cuff, bite it hard and full, and then hang on while they're lifted off the ground it makes sense that the mouth and jaw are so important. I wonder if the shorter muzzle makes the bite more efficient.
Ann WI
As i am learning, i am told boxers need to build up "good grips" at a young age, since they are at a disadvantage relative to the GSD's, Mals and such when it comes to bitework. We are starting with Trucker now to make sure when he bites, he's using his full mouth (not just the front), so that when he gets to the point of bite work, he can be lifted, etc. We are currently tagging along w/ Trucker's brother's owner, who is a helper quite often in his club, and he was showing us the difference in bite marks (the GSD's compared to his girl's bite), and it's a huge dif. That being said, i do not think the short muzzle is an advantage.. the width that we often see with the euros is needed to help compensate (create more surface area) to get that good bite. (i think anways..

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I was remarking to Richard after our first session w/ Charles, and said our boy Brutus probably would have had a decent bite-hold, as he had width, and a muzzle that was a bit longer than preferred... lol, we lovingly deemed him "hippo-mouth".