A protection dog does it, to give you one option, before you die.(Not get holes in your left arm) There is no script, no routine, no anything. This dog initiates it, because you are on the border of breaking one of his rules. ANY outright violation of one of his rules, and you die.
Can you see a difference now?
Some don't want this warning, in their dogs, so they don't do it. Some just fire off and eat you with no warning whatsoever. As long as the owner is responsible for his dogs, I could care less.
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"