The topic is training not testing.
What you call conflict I call stimulation and encouraging fight. More than dominant or fight drive its drive to simply hold on.
"Zero" is simply your exaggeration its not a fact.
Pulling the dog back by the nape is somewhat conflict. You don't have to exaggerate to try making a valid point.
Certain dogs feed on pressure..yelling and growling stimulates them. These lunatic dogs have been bred and handled this way and selectively bred this way like many other lines of dog. Just like fighting dogs.
My criticism is there is no technique and instead of letting the dogs work..DD works the dogs. If you can't see that..oh well.
Further..how would the brindle hold up with quiet bitework?
For a dog that needs a fight, silence IS conflict.
Free your mind.
E-Dog - 2012 WPBTCA National Championships
The time when screech owls and Bandogges howl and spirits walk and ghosts break up their graves.
Act I, Scene IV of William Shakespeare's "King Henry VI"