Tazer aggressive behaviour we will use positive reinforcement of praise/food to change his mind to become calm by looking at owner and receiving praise "good, dog" and pats or food. If Tazer disobeys responding to his name to focus on handler then he will receive a correction of negative reinforcement of pinch collar to get him to focus back onto his handler to receive the positive reinforcement. (Make sure this is done before Tazer does go into defence drive - keep him under low distractions for this training).
Homework - start using his muzzle for walks out in public to get him uses to wearing it for longer periods and other situations in preparation for our next steps of training of desensitising him to people. Teach Tazer to focus on me when I say his name.