“It’s the owners that teach them to be vicious.”
No it is not. I’ve been a professional trainer for decades and some dogs have been raised to heard livestock, others to follow a scent trail, and others to bite and fight.
It is centuries of manipulative breeding to insure certain instincts are present in the blood lines.
If you don’t believe it go to youtube and search for border collie puppies herding ducks.
The puppies have almost zero interaction with humans and have never been out of their kennels before but when put down with a flock of ducks they begin to “work and heard” the ducks in a very obvious fashion.
That is bred in instinct just as pit bulls have a bred in instinct to bite and fight.
You can enhance instinct and amplify it with training but dogs are either born with it or not. Not every border collie turns into a great working dog but they tend to work things that move, even kids. Not ever pit bull turns into a monster but the time and place that something triggers some into the bite and fight mode is very unpredictable.
Thank You. I’m so tired of that talking point.