How dogs were domesticated?

It is supposed that men domesticated the dogs 15 000 years ago, as a source of food. Their fur was also used to make clothes. Later, when humans domesticated other animals, the dogs were only used for guarding. It is supposed that the domesticating process lasted for quite a while. The humans used to steal puppies from wild dogs, raising them in captivity. When the dogs grew, they were domesticated. It sounds simple, but the ancient dogs were not as kind and peaceful as the ones from today.

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