Having evolved with a strong need to survive by hunting and defending their dens and pack mates, by their very nature dogs have become aggressive animals. Of course the evolution of dogs necessitated their aggressive instincts, but in today's world a dog with aggression problems must be controlled. If your dog is an aggressive one,  knowing which reason causes your dog to be aggressive will help you figure out how to go about correcting his problem.

Check out this list of the 6 most common dog aggression problems.

• Dominance Aggression: When 2 dogs first meet they have a little ritual to establish who is the dominant dog, and conversely, who is the submissive dog. Because dogs live in a pack society, it is necessary for them to establish a pecking order, so that every dog knows his place in the pack. Most of the time, this process is figured out quickly and without any friction or aggression between the dogs. Displays of dominance normally only lead to dog fights when one of the dogs refuses to become submissive to the other dog.

• Fear Aggression: The next type of aggression, fear aggression is caused by very different reasons than dominance aggression. When a dog is suffering strongly from fear aggression it is common for it to lash out at whatever is close by. A dog that has suffered from abuse by someone, will often show their fear aggression in a response certain people. A dog suffering from fear aggression shows it by cringing low down with his tail up between his legs and agaisnt his stomach; he will also whine and moan and may snap and lunge to bite at the source of his torment; It will be baring all its teeth while snarling, whining and moaning. Because the dog might also snap its teeth and lunge at anything nearby, you want to avoid trying to comfort a dog in this state.

• Territorial Aggression: Territorial aggression is a very common form of aggressive behavior. This type of aggression originated when dogs needed to defend their families and their dens from predators-nowadays they want to protect your family and home instead. You want to be sure your dog is not overly protective because his aggression could lead to him attacking another dog or person. Be aware of territorial aggression problems, and correct them as soon as you notice them with your pet dog. You can't allow your dog's aggressive barking to turn into actual biting.

• Redirected Aggression: This type of dog aggression can often be confused with other aggressive behavior.  Sometimes a commotion may happen on the other side of your fence that stops your dogs from reaching it, and in their fury they may sometimes attack each other. Kind of like when sharks have a frenzy. The grip of the aggression got so strong that they even attacked their own buddy.

• Predatory Aggression: All dogs are born with the instinct of a predator deep down. Even though many of our pet dogs do not display this aggression, it is not uncommon to see predatory aggression quite frequently. Predatory aggression is often expressed by our dogs when they chase a cat or another dog or a bird. Many times they are only chasing because they enjoy the thrill of the chase and not to kill. On the other hand, sometimes they are very serious, so this too is a problem that needs to be corrected.

• Medical Reasons Causing Aggression: Female dogs that are either pregnant or have just recently given birth and are taking care of their puppies are often much more aggressive than usual. A dog that is feeling unwell may have something that is causing him to respond with aggression.If you notice your dog having unusual aggressive behavior for no understandable reason, make sure his health is fine with a visit to your vet. One other category that comes to mind is when a dog is just goofy-some dogs are just not right in the head. Just like some people we all have met, that's just the way  they are.

If you understand how to recognize and diagnose the reasons for your dog's aggression problem, you can figure out the right method for correcting his aggressive behavior problem, and making him a better behaved pet who is much less likely to create any problems because of his aggression.

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