Faculty of veterinary science, Chulalongkorn University, Bangkok, Thailand. Explain that the engagement between a man with a dog has evolved since ancient times. In the first stage, humans have brought wild dog feed. Take advantage of the hunting and protection of the human being, such as help in watching some of the treasure hunting or watching a herd of animals that feed on humans for food. By feeding a human with a dog as a reward. Later, the men have brought various animals more feed. At present, because of social conditions and the lifestyle is more competition. The purpose of raising a dog, it changed to become a pet dog to other benefits, such as raising a friend fix am lonely, etc.
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