How to train a dog to be more aggressive?

The owner can ask a family member or friend to help with training. For the helper’s safety, leash the dog and stand beside it, then have the helper pretend to attack the owner. When the dog barks at the helper, the helper pretends to flee in fear and the owner rewards the dog with food. Through repeated training, the dog develops a stronger instinct to protect its owner. However, it is generally not advisable to train a dog to be too aggressive, to avoid it hurting people.