Most dog trainers like to refer to this dog-man relationship as a pack bond, a bond that consists of an ALPHA male and the rest of the pack. That’s how a dog interacts with the people surrounding him. He thinks he is the alpha male and he will be protective and in the same time aggressive.

And as most packs, he has a territory in his possession. In here, the favorite places or items, the favorite toys, etc can be a cause of aggression. So, threatening his surroundings can cause your dog to display aggressive behaviors and even biting, because he looses control over all his critical resources.

One of the best response to this kind of behavior is a early and proper collar training. It should be done starting in the puppy stage, but if he is a grown dog you can use remote dog training collars. These will control his aggressive behavior. But you should first check to see if he indeed has a true aggressive posture.

Most dogs that wag their tales when they see their owner are friendly in nature. The ones that be in an aggressive phase will try to show dominance with serious facial expressions, showing his teeth, not to mention a stiff physical posture and fixed focus and eye contact with the “dominated”. The worst scenario is when he starts growling and snarling at their owners or even jumping at them, trying to bite.

Barking isn’t considered a violent symptom. It’s something natural for a dog to bark. It’s a manner to express his joy of seeing you, or warn you of something wrong. In a newspaper there was a case of an old lady who got saved by her dog. He started barking intensively because he smelled the gases fuming around. The old lady was asleep and the gases could have killed her if it weren’t for the dog. She quickly exited the house to get fresh air, as she felt headaches.

You can’t ever train your dog to totally cease barking. You can control his aggressive behavior by stating the obvious, with exercises and proper commands: I am the alpha pack leader. The dog will sense that and will act accordingly and be receptive to your instructions.