With all due respect can you really manage a aggressive dog when your knowledge about dogs seems almost negligible. Even if you consider an average of 1 dog year = 4 human years, your 1 year dog is equivalent to a 4-5 year old human. How many 5 year old kids are or should be aggressive, have any guarding, patrolling skills. You seem to be confused about the difference between trained protection/guarding skills and uncontrolled aggression. Please do a little research on the net, then seek assistance from professional trainer if you don't want your dog to attack and bite everyone within his sight..