Understanding Aggression - Learning from Cesar

Dogs become aggressive out of frustration and dominance. The frustration comes from a lack of exercise, and the dominance comes from a lack of calm-assertive leadership.
When dealing with red zone dogs, I start by working with the owners, explaining how to establish themselves as pack leaders and to understand the animal in their dog. This is a crucial part of rehabilitating your dog: changing your behavior. If you revert to your old ways, so will your dog.

For many of these dogs, it is a lack of adequate exercise that is the root of the problem. Physical activity burns the dog’s excess energy and helps maintain his healthy state of mind. This is important because, in order to talk to the mind, you need to remove the energy from the body.

If you live with an aggressive dog, I urge you to find a professional dog trainer to work with you and your dog. Most cases can be rehabilitated with time and dedication, and we owe it to our dogs to try.
More Information on Aggression:
Tips: Breed & Aggression
Tips: Case Study - Emily the Pitbull
Book Excerpt: Case Study - Bandit the Chihuahua
Dog Whisperer Blog: Kid-Aggressive Canines
Dog Whisperer Blog: Human Aggressive Buddy