Human hubris, fucking up Nature as usual.
DERP
There are no "natural" dogs, fucktard. Dogs are a creation of man.
Yes and no....dogs co-evolved with humanity. If you want to look at "natural" dogs - look at what are commonly called "village dogs" or "pariah dogs" or "street dogs". The whole purebred dog thing is actually a creation of the Victorian era.
Nope.
Dogs were bred from wolves. Camp wolves were domesticated and using selective breeding ALL of the dogs that exist now were created.
{
Dogs were just a loose category of wolves until around 15,000 years ago, when our ancestors tamed and began to manage them. We fed them, bred them, and spread them from continent to continent. While other wolf descendants died out, dogs grew into a new species. We invented the dog.
We didn't pick just any wolves for this project. We picked the ones that could help us and get along with us. Dogs are dumber than monkeys and other mammals in many ways, but they excel at one thing: interpreting human behavior. Three years ago, scientists tested this talent in wolves, adult dogs, puppies raised in households, and puppies raised in kennels. The wolves couldn't read humans well, but the puppies could—even the puppies raised in kennels. Through selection, we've hardwired human compatibility into dogs. We've made a species in our image.
}
Our creepiest genetic invention: the dog.
Now Slate is a Nazi hate site that spews the kind of shit that Pillowbite does, but they are right on the science part.
There's some dispute with that actually. Have you ever read Ray Coppinger's book on dogs? It's really well worth the read and it (among other research) takes a different path on the domestication of dogs, one which in my view makes a lot of sense. Domestication usually begins with a species that gradually evolves to live close to human habitats - the flight/fight response is suppressed. Dogs evolved from a common wolf ancester - but they evolved, they weren't selectively bred until later. They evolved as scavengers - a role they still have as ferals around the world. Their jaws are weaker than any wolf, their instincts are different - unlike wolves they have evolved to bond with humans. There are a lot of interesting experiments on the differences between wolves and dogs (your link is one). This also explains why wolves never really become like dogs. Even if you bottle raise a wolf pup from birth - it is still a wolf. It is shy, powerful, not strongly bonded to humanity - it's not useful to a primitive human as a hunting partner. It's hard to imagine primitive people starting with a wild wolf and selectively breeding - that is resource intensive and doesn't make sense in a survivalist society. But if you start the process with an animal that is already partly domesticated through close association with human habitats - it's a bit easier. To me it makes sense that they co-evolved.
Dogs, But Not Wolves, Use Humans As Tools (this one might be based on the one you linked to)
http://www.sciencemag.org/news/2015/09/why-dogs-turn-us-help
There is a documentary somewhere where the Russians did a long experiment with caged wolves. Some of them almost never came to trust or work with humans, while others VERY quickly trusted humans and easily became domesticated. It has to do with the genetics of the wolves themselves, humans didn't breed anything into wolves 10,000 years ago. Some wolves were predisposed to form a symbiotic relationship with humans which was beneficial to both.
They did something like that with foxes as well and that was interesting - they selected for the "tamest", most easily handled, least frightened. The other side of that selection process was that they also started to see altered morphology. The animals showed white markings, more "infantile" characteristics (in many ways, selecting for tameness is also selecting for traits that occur in the very young) - they were seeing more domed heads, dropped ears for example.