In History, there are many stories of the dog helping or rescuing their masters. Like in the story of Sounder. The dog fights off the police to save it's owner. Everyone has heard a story like that. The dog being the heroine and all. With then great history there is no doubt why dog is called man's best friend.
Dogs are important to the human race. They bring happiness to the face of many people. They are companions to elderly people. They are best friends to little children. Many of my childhood memories is of my playing my front yard with my dog named Bear.
Dogs can also make you happy. Just look how happy this young ladies' face. She's so happy. Smile!!