However the dog that has been well socialized and under good control can be trained to quickly settle down and relax. For dogs exhibiting territorial aggression, you will need to gain enough control to have your dog sit, stay and when calmed down, take a reward at the front door. Generally a leash and head collar will give the fastest and most effective control. Once the dog can be controlled and receives rewards in this environment, gradually more intense stimuli can be used. Sometimes, an anti-bark collar, shake can, or air horn, can be used to disrupt the initial barking, so that the pet can be directed to perform the appropriate behavior and get its reward.
Predation is the instinctive desire to chase and hunt prey.
Predatory behaviors include stalking, chasing, attacking, and ingestion of prey animals, but may occasionally be directed at people or other pets. Some dogs that have never shown chase or predation, may display the behavior when running together with a group of dogs. Although the desire to chase can be reduced by using a head collar and desensitizing and counter-conditioning in the presence of passing stimuli, this is a very dangerous form of aggression which must be prevented. Whenever the dog is outdoors it should be confined to an escape proof pen or run, or controlled securely by the owners. A leash and head collar or a leash and muzzle, can help to ensure safety when out for walks.