They are the four-legged lovable creatures and man's best friend: a dog.

Through the ages, man has called dog one of his closest companions.

Dogs share 99% of their DNA with wolves.

However, dogs exude a sense of warmness to other dogs and humans, unlike the wolf's reaction to others.

Dogs are social pack animals who require attention and affection just like humans.

Dogs are cute, happy, loyal...

To put this simply, dogs are awesome!

Science reveals a strong human-dog bond.

Just looking in your dog's eyes boosts happy hormones - oxytocin in human brains.

They are the best medicine for someone who is lonely, old, or depressed.

There are service dogs that aid the visually-impaired and disabled.

Also, they act as counselors in fur for thousands who battle psychiatric disorders.

Having a dog lessens heart strokes, lowers blood pressure, and cholesterol.

Every dog breed is intelligent, and they understand hand signals.

They mimic our emotions through our voice and body language.

They are incredible examples for faithfulness and loyalty.

History has Hachikō, a great loyal dog that waited nine long years for his deceased owner.

Honoring its loyalty, there is the bronze statue of Hachikō in Shibuya station, Tokyo.

While early day man had dogs for guarding cattle,

today, they are a member in our families, guarding our elders, infants, and homes.

This bond of companionship is inseparable.

Surprisingly, recent trend has dogs as a team member in corporate.

Because just petting of office dogs reduce stress hormone - cortisol,

and improves higher creativity, productivity, and team cooperation in the work place.

And dogs love sniffing.

Their intelligence can be compared to none.

Search-and-rescue dogs find missing people in mass-casualty events and natural disasters.

They risk life and paw each day to protect the public.

A big salute to those four-legged guards working without anything in return.

They're wonderful and viable sentient beings that deserve compassion and respect.

Well, if you could work your entire life to be happy and still never attain to the level,

it's time you adopt a homeless pup who is sure to change your life for the happy you.

Because a dog is one absolutely unselfish friend a man can have.