[DManA]

Actually no. Current thinking is that wolves were attracted to human rubbish piles. The ones who were naturally less nervous around humans got the most stuff and survived better to mate with other wolves who were less nervous. This self selection repeated over a number of generations until you had an animal with dog like characteristics.

What happened naturally was replicated experimentally in foxes in Russia.

is believed that dogs were originally taken from the wild as wolves by early humans who selected and bred different varieties that were useful for companionship, hunting, and protection.

[MrB]

Who the heck decided a “yorkie” was “useful”?

[lormand]

"What happened naturally was replicated experimentally in tamed foxes in Russia."

I probably saw the same program as you did regarding the fox experiment. The experiment showed that the DNA in the tamed foxes actually changed and started forming variations in color and tail shapes/behavior.