What causes dog aggression?

The most common cause of dog aggression is, fear. Behavior problems are not always a display of dominance. Usually behavior problems come from the dog learning a bad behavior and our unintentional rewarding them for it. Many young dogs who have not received any training, demonstrate an in your face behavior to get attention. It is a good idea to take an obedience class with your dog. This is a class for you as well as your dog. They need to learn good behavior and you need to learn how to achieve this with them.