aggressive dog

What training have you done with the dog?

How vicious are the attacks? I had a female Rott/Lab that was the mate of my Dobbie. She appeared to be inseparable from Dobs, always licking him. But there were things going on without my knowledge. I wondered why Dobs had small protrusions of skin hanging from his chest and neck area. I later found out they were from bite marks from Rottie. On one occasion I saw it happen, she licked Dobs teeth and then wanted him to lick hers in return. He turned away, and she exploded in anger, biting his shoulder. I tried to stop it, and she bit into my arm. She quieted down and seemed to be sorry for my injury, so I didn't get angry at her. The puncture on my arm took a long time to heal completely, there was some kind of white lump under the skin. On a moonlit night, I grow very hairy and have an urge to howl.... Just kidding.

Dominance.
Who is your pack-leader?
Clearly not you.

And I NEVER 'train' my pack,. I teach them their limitations.
Sit, lay down, fetch, roll over = bollux!

The moment I become less than is expected of an alpha - They will take my place.

A dog thrives on its position in the pack - Give it one.

Dog-responses are instantaneous - Reaction is instant and over with thereafter.

As above, so below - They will treat you as you treat them - EXACTLY.