Animals have been a mean of service to human race from the day of first human and animal existence. The history of this relationship is as old as the history of this world. There are many ways through which the animals have served the mankind and the mode of these services have changes over the course of years except the fact that there are few services that remained as they from the first day of this relationship. The relationship between the man and the pets grew over the years and it strengthens as times passed by. This relationship contains a special deal of closeness and has always been a relation of comfort for the mankind.
There are different ways through which the animals have served the human race. The animals are the one used for several scientific researches through which the betterment of medical facilities have ensured. The use of animals for extracting different kinds of chemicals for the treatment of various diseases is not new to the human being. Similarly the animals have served the human race through transportation for centuries. Even now, there are several parts of the world where animals have been used for transportation. The aspect of service through transportation has declined over the period of time but other aspects of relationship have increased. These other aspects include the use of animals to treat several stresses and to be used for the avoidance of loneliness and the service as family member.