No one wants to have to deal with aggressive dog behavior. After all, it's not just you who has to bear the aggression. Dog aggression can also be directed to your home, family, other pets and members of your community. When that happens, dog aggression can become a real burden.
Naturally, you would want to curb aggressive dog behavior. The question though is how do you do that. The first real step is not to call your dog trainer's hotline. The first step is to try to understand why your dog is being aggressive. It is only when you understand your dog that you can avoid some mistakes of interaction that could be contributing to your dog's problem behavior.
There are many reasons for aggression in dogs. One of the top reasons is natural dominant behavior. If dogs lived among themselves they would have the natural tendency to establish a hierarchy, identifying each other's level of dominance. Dogs that show aggressive dominant behavior in your home may only be following their natural belief in their own top level ranks. The key therefore to this problem is to teach your dog that you occupy an even higher rank and that you are the alpha creature in your home.
Naturally, training your dog to recognize your authority is easier said than done. Stopping aggressive dog behavior however is not impossible. Now that you know what has to be done, the next step is to look for the right resources. If you have the extra cash, you could pay for classes for both you and your dog to learn a new authority hierarchy. You could save a lot though if you settled for a step by step online guide that costs much less than a formal obedience class.