sorry evo, fox will not only check your kidneys but he will check your throat very hard and had freak strength and speed as well, did not push like a dumby, he knew how to use angles as well, trust me he was not a one dimensional hound, he was very special, and he is producing his ass off.
Head dog has the advantage for that reason and the fact that the other dog's head is where its weapons are.
He who controls the head controls = how much he gets bit ...
Meanwhile, he whose head is controlLED = he who is ineffective.
The only other place you can bite, and not control the head, is deep in the throat.
From a tactical standpoint, breeding for dogs that control the head = breeding dogs that control the deal.
Jack
We do similar things, just in reverse: I breed dogs that latch onto the head and then, hopefully, shoot for the throat
I prefer to try to establish control immediately, which almost invariably comes from a head-hold.
To me, a head-hold is like the jab of a good boxer ... and going into the throat a right cross to finish.
It is harder to land your right cross, if you've not first established control/range/timing with your left jab.