He or she can weed out dog aggression and help pet owners understand the rules of the canine world. A dog trainer can be a great investment if it means your animal's safety and your sanity.

Maybe you have not heard of a show called "The Dog Whisperer" featuring world renowned dog trainer Cesar Millan but it has gained tremendous popularity as more and more pet owners turn to his expertise to show us how to love and care for our dogs.

He is famous for his pet training obedience classes as well as coming into select family homes to show them that a pet trainer teaches both the dog and owner how to coexist and be a happy family.

Why is this particular dog trainer so popular? It is because he takes dogs that might otherwise be a nuisance or a danger to others, and rehabilitates them on the dog's level. He understands the mindset of a canine and as such can make tremendous strides in training a dog.

There are dogs on the show that were not given any puppy training and have come to rule their owners. They bark, growl and bite. Yet, Millan goes into the house and interacts with the dogs using "pack mentality" that works.

The canine world has a system of hierarchy within the pack. There is the Alpha that is dominant over all the other pack members. He or she is the boss and the rest take their cues from him or her.

Millan teaches the owner that he or she must become the Alpha to their pet in order to take control. The owner is the boss, not the pet. When this occurs, the dog's aggression and resistance will subside. It is a role that must be constantly reinforced but one that is absolutely essential.

Training dogs takes a lot of knowledge, patience and love. Cesar Millan is a pet trainer that loves what he does and enjoys helping families in need of becoming whole.

Even if you never get the chance to watch his shows or have him personally be your animal trainer, you can still find valuable information on his website, Cesarmillaninc. There are veterinarian tips, columns written by Cesar as well as Illusion Millan and even a forum.