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Dog a pet one of the most common companion animals. Initially, the family dog was singled out as a separate species by Linnaeus in 1758 reclassified the Smithsonian Institution and the American Association mammalogists in a subspecies of the wolf.

From a zoological point of view the dog placental mammal of the order of prey of the family canine. Dogs are known for their ability to learn, love of the game social behavior. Withdrawn the special breeds of dogs intended for different purposes hunting protection traction cartage as well as decorative rocks.

The belongs to the most ancient of all animals. Scientists agree that was domesticated in the Old World in the era of the Upper Paleolithic however about the exact location time period and causes of domestication in the scientific community is still no consensus. Rock paintings drawings and findings of archeologists allow scientists to draw some conclusions and assumptions. In the Volga-Oka interfluve shows all along the Mesolithic and according to archaeologists, was the only pet. Mesolithic different large size and powerful jaws. Judging by the trail of cutting on the bones the local people had used the dogs to eat. The main role of period an assistant on the hunt.

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