Aggressive dog - How to deal with your aggressive dog(s)

There is a training technique that I found on the web from a pit bull owner, and it is said to works wonders.

Pit Bulls number one problem is dog aggression because historically they were bred for dog fighting.
It's called " Bar Open" "Bar Closed" when you are walking your dog, and you see (and your dog sees another dog) feed treats over and over again (aka Bar Open) until the dog is out of site.

Once the dog is out of site, stop feeding treats (AKA bar Closed). Your dog will start to associate that every time a new dog is around it's a VERY positive thing.

I'm sure if it can work on rescued pit bulls who were abused by their past owners by putting them in dog fights, then it can work four yours
Good luck!