Frustration aggression
The next component of the package we call "fighting drive" is frustration aggression. Frustration aggression is also a form of reactive aggression that is created by depriving the dog in one of the lust oriented drives or at least by preventing their satisfaction. This form of aggression in my opinion serves the purpose of relieving built- up drive energy that has no proper outlet. The most useful drive to create this type of aggression in training is naturally prey drive. But other positive gain motivated drives can also be used. Such as hunger, sex drive, social reunification (or pack-)drive, or simply a high desire to expend physical energy through movement. When the satisfaction of these motivations is blocked, the dog experiences a sense of frustration. This frustration will reach a point where the dog reacts aggressively. Once this stage is reached, the aggression appears in the same form as all forms of aggression. Barking, growling and biting are the actions that are visible.
I made a short point during my discussion of prey drive, that a properly socialized dog will generally not bite a human being in prey drive. However, if the prey drive builds up to a certain level, and no outlet is presented, frustration aggression will set in. And once a dog is in a state of aggression, he will bite a human being.
Good examples of this model are high drive Malinois, who reach an aggressive state very quickly, because of their high drive and the fact that they seem to frustrate easily.
This is a very useful form of aggression, as it presents a much less risky training methodology than, for example, defense drive, yet still adds intensity and seriousness to many dogs.