You definitly want to find a trainer that uses positive reinforcement for an agressive dog. The methods that BarkBusters uses can reinforce agression and cause an agressive dog to start masking warning signs. I have personally had 2 foster dogs thanks to their methods and when I read the report the family was given I was enraged. What they couldn't seem to accomplish with the surrendering families was definitly workable and was helped with positive reinforcement. Too bad by then the families had had enough.
