Peace of mind... for pets and their people.
There are a wide variety of types of aggression [Defensive aggression, fear-induced aggression, fear-modified aggression, predatory
aggression, aggressive play, maternal aggression, pain (or anticipated-pain) aggression, dominance aggression, territorial aggression,
protective aggression, possessive aggression, neurologic-related aggression].
Some are learned, others are inherited tendencies... most are some combination. The targets of the aggression can vary widely as well.
Family members only, only specific family members, only strangers, only other male dogs, all dogs, other male cats, only Frankie the cat,
only men in uniform or people of different skin color, or 7-9 year old boys, or very big men; ...you get the picture.
Fear is often a factor in aggressive situations. It can operate as an influential force, or it can be the driving force. Seldom is fear not present
as a factor. But when that is the case, the results are striking. This is an animal that is acting aggressively without any fear acting to inhibit
the aggressive display. This is most evident in the form of predatory aggression... "the fearless hunter".
You see, fear in many situations acts to inhibit the aggressive urges.
The best advice anyone can give you without a true working understanding of the problem is avoiding getting into the situation(s) where
you expect the animal will get aggressive.
There are certainly situations in which meeting aggression with aggression or increased aggression will help; there are plenty of other
situations, however, in which you could die trying, teach the animal the wrong lesson, or create an overly fearful/submissive animal.
If you have an aggressive animal (if it growls, snarls, wrinkles its muzzle, lifts its lip, barks menacingly, snaps or bites), you are well
advised to seek the assistance of a professional companion animal behaviorist.