Dog aggression is seen in all breeds of dogs but some breeds do have more tendencies to display aggression than others. We normally associate dog aggression with the larger breeds since this is what we hear about the most. Let’s face it if you are attacked by a Chihuahua you will not sustain as much injury as if you were attacked by a German Shepherd.
You can take steps when your dog is just a young puppy to help overcome aggression issues that may occur as the puppy matures. After your puppy has had all his shots it is a good idea to socialize him with older dogs(make sure the older dog is not going to attack your puppy), adults and children. We want our puppy to have good experiences and to realize other dogs and strangers are not to be feared.
When your puppy is young and does show sign of aggression you have the opportunity to easily correct the behaviour. When a puppy growls when you try and take his toy from him at this age it may seem cute, however, when same puppy does this 10 months from now it will NOT be cute at all. Taking care of the aggression at a young age will save you much work down the road.
All aggressive behaviour is not the same. A dog can be aggressive in order to maintain his spot in the pack. A dog can show aggression at another dog or human because he cannot get at his true target so he will redirect his aggression to whom or what is ever handiest. They can show aggression when they feel their food or toy is threatened. The list goes on.

Aggression can be properly dealt with. At Secrets to Dog Training they have a whole section that deals with an aggressive. Many people have had success dealing with their dogs’ aggression. Yes it will be a lot of hard work but isn’t your dog worth it?