Aggression is a serious behavior! As a dog trainer (5Star) & Behavioral Counselor for 21 years I have specialized in Aggression. I’ve had amazing results! Read my Google reviews on my Success and Reviews tab. This is NOT shop around for the best price, you need quality, experienced knowledge and the “best treatment” for your dog. It will pay off in the long run. How many years will you have the dog? Divide that by the cost.