How Did Dogs Become Adept at Playing to Humans?

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"Based on these observations, we suggest that the key difference between dog and wolf behavior is the dogs' ability to look at the human's face," Miklósi summarized in Current Biology. "Since looking behavior has an important function in initializing and maintaining communicative interaction in human communication systems, we suppose that by positive feedback processes (both evolutionary and ontogenetically) the readiness of dogs to look at the human face has led to complex forms of dog-human communication that cannot be achieved in wolves even after extended socialization."

If these two relatives can't relate equally to people, how did a dog/wolf split allow dogs to develop superior people skills? That question led Hare to Siberia, where scientists are continuing a running evolutionary experiment that's decades old.

Fox Study Poses Tantalizing Questions

In 1959, the late Dimitri Balyaev and his colleagues began domesticating foxes. Since that time a population of foxes has been selectively bred on one factor alone—their behaviour towards humans. Foxes who approached humans at a seven-month-old trial meeting were allowed to breed, while others who appeared afraid or aggressive were disqualified. After 20 generations the population began showing many signs of domestication, such as approaching humans and even wagging their tails and barking at the approach of a human. The animals are currently domesticated enough to serve as house pets.

But the selection has affected more than behaviour. The foxes, like many domestic animals, began to exhibit curly tails, floppy ears, and smaller tooth and bone size—though none of these were selection criteria.

Could cognition be a breeding by-product like these physical changes? Hare hopes to explore the question by testing the foxes.

"The critical thing is that they did not select for cognition, only for niceness," he explained. "I have no idea how dogs became dogs; There are stories but not hard facts. But I know exactly how these foxes became they way that they are. So those kind of test results could help us figure out—is it that you must have selection for intelligence to be smart, or could it result from selection on other factors like behavior towards humans?"

"Just as you have accidental byproducts like curly tails and floppy ears, could you become smarter as an accidental byproduct of selection on niceness?"

While he looks forward to continuing his research with dogs and foxes, Hare also enjoys pondering the question's potential implications for humans.

"Many anthropologists think that as humans evolved we became smart because it's good to be smart," he said. "But maybe it was selection on what scientists and breeders call temperament. "Maybe nice people eventually became smarter, rather than smart people becoming nice."

Brian Hare examines the human/dog relationship with Ultimate Explorer correspondent Mireya Mayor on Love Those Dogs, premiering Sunday, February 8, at 8 p.m ET/PT on MSNBC. Mayor also explores doggie yoga and spas, goes on a beat with hardworking police dogs, and investigates the dark side of the purebred puppy market.

Nationalgeographic.com Resources on Dogs

More Dog Stories by National Geographic News

Seizure-Alert Dogs Save Humans With Early Warning
Dogs of War: Inside the U.S. Military's Canine Corps
Did Carolina Dog Arrive With Ancient Americans?
Salukis: Ancient Dog Breed Still in the Hunt
Guard Dogs: Newfoundlands' Lifesaving Past, Present
Hollywood Gives Stray Dogs New Leash on Life
Scientists Start Deciphering Dog Genome
Animal Acupuncture: More Pets Get the Point
Human Gestures Fed Dogs' Domestication
Dogs Are "True Heroes" of Iditarod, Race Champ Says
Crisis-Response Dogs Offer Comfort After Tragedy
Brooklyn Dog a Rising Star in New York Art Scene
Canine Companions May Help Kids Learn to Read
Life Is Serious Mission for Rescue Dogs
Therapy Dogs Seem to Boost Health of Sick and Lonely
Veterans: Dogs of War Deserve a Memorial
Bear Dogs on Patrol for Problem Grizzlies
"Detector Dogs" Sniff Out Smugglers for U.S. Customs
U.S. Beagle Brigade is First Defense Against Alien Species

News Stories About Other Canids

Hunting Helps Expand U.K. Wildlands, Study Says
Red Wolves Back From Extinction in the U.S. Wild
Eco-Terrorism Blamed for Tasmania Red Fox Release
Thriving Gray Wolf May Come Off U.S. Endangered List
Scandinavian Wolves on Road to Recovery, Study Says
Rare-Dog Search Meets With Success, Then Tragedy
Most-Endangered Wolves May Be Saved By Vaccine
Coyotes Now at Home in Eastern U.S.
Is U.S. Safe From Foxhunting Debate?
"Olympic Mascots" Killed as Pests in U.S.
Hi-Tech Tracking Tool Tested in Wolf Recovery Efforts

Other National Geographic Dog and Canid Resources

National Geographic magazine: A Love Story: Our Bond With Dogs
National Geographic magazine: Wolf to Woof: The Evolution of Dogs
National Geographic Special: Return of the Wolf

Related Lesson Plans:

Lesson Plan: Little Red Riding Hood Meets—A Golden Retriever?
Lesson Plan: Geographical Dog Show
Lesson Plan: From Wolf to Woof
Lesson Plan: The Human Role in Dog Evolution

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