Dog aggression is a serious problem, but there is help for it. Our brains can be rewired by our environment. Using operant conditioning you can help your pup to choose a calmer path and manage aggression or anxiety, just like therapists help people manage these issues.
In the past I have had highly aggressive dogs, one I was not able to help. Since then I have studied further into the issues of dog aggression and anxiety so that myself and others can come through the tough situation of animal aggression with a positive outcome.