An attack dog is a dog bred, trained or used for the purpose of attacking a target.
Dogs were (and likely still are) trained to attack and bring down bears. One dog would be trained to jump on the bears back and attack the back of its neck, whilst the other would attack it from underneath. The "under dog" was far more vulnerable than the "top dog" hence the terms.
Maybe they are trained to attack
the dog was specially trained to attack the person and so the attack looked worse than it was
If you are asking how to make your dog aggressive, it may need to be trained as an attack dog.
A goldenretriver is easy to trained and is very good
why would a weenie dog attack a bull mastiff puppy for
it would not attack you because the dog would be all alone DUHHHHHHHHHHHHHH
Any dog, even well-trained ones, can attack if they are scared or feel threatened.
Most K-9 dogs are trained and handled by one or two people, and they usually decide on one command for each dog.
it can be dangerous as it could not know you and as being trained to attack intruders it may attack you and it could give you serious injuries and wounds or even kill you
The cast of Black Falcon and the Missing Dog - 2013 includes: Alex Zavaleta as The Black Falcon