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In general, the domestic dog may be the oldest domestic animal, because it is supposed to be domesticated by way of a person ten to 15 thousand years back. The first remains of a domestic puppy were found out in Mesolithic sites in different places. It appears that the earliest European breed of dog was quite small and would, in general, be best compared to today’s guy. There is almost no animal species in the world, within which there will be obvious differences in the exterior and the canines. Some social people associate diversity with various ancestors. Many old authors, based on the diversity of today’s pet breeds, believe that your dog was shaped by crossing various related species from your dog family. Included in this were also the newbie of the theory of evolution Charles Darwin and the Austrian ethologist Konrad Lorenz, who figured the ancestor of the domestic doggy has been a wolf and a jackal. Another, more probable and, more recently, a more and more supported concept scientifically, speaks of the common ancestor of a wolf and a domestic canine. In accordance with this concept, the current diversity of dogs is meant to be due to intensive, pretty much prepared breeding and choice, and sudden, unpredictable heritable genetic changes – mutations even. The result may be the emergence of several different varieties of dogs, whose specimens differ in size, torso and head, color, high quality and length of the hair, and lastly furthermore in usefulness for different purposes.

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