Stray Dogs May Understand Human Signals, Too
A new study has found that strays in India, when presented with two covered food bowls, were more likely to approach the one an experimenter pointed toward
Dogs are famously good at interpreting human signals, whether communicated verbally or through gestures. But much of what we know about our furry friends’ comprehension of social cues focuses on pet dogs, which share close relationships with their owners and are trained to follow commands. Now, a study published in Frontiers in Psychology, suggests that stray dogs can also understand human gestures, indicating that this ability might be innate.
The new research took place on the streets of several regions in India, which is home to some 30 million stray dogs. Coexistence between canines and humans there is not always peaceful; people have been known to attack street dogs, and vice versa. Around 36 percent of the world’s annual rabies deaths occur in India, most of them children who came into contact with infected dogs.
To better manage the country’s street dogs, it’s essential to gain further knowledge of their behavior, Anindita Bhadra, study co-author and animal behaviorist at the Indian Institute of Science Education and Research Kolkata, tells Liz Langley of National Geographic. So she and her colleagues set out to discover whether strays, which have never undergone specific training, are able to understand humans in a similar way to their pet counterparts.
The researchers took to the streets equipped with two bowls; one contained chicken and the other was empty but had been rubbed with raw chicken, transferring the food’s scent. The bowls were covered with pieces of cardboard and handed to an experimenter who did not know which one contained the snack. This researcher would approach a stray dog, place the bowls on the ground and point at one of them, sometimes momentarily, sometimes repeatedly.
In total, the researchers studied 160 adult strays. Around half of them refused to get close to either bowl, perhaps because they had negative interactions with humans in the past, the researchers speculate. But of the dogs that did approach the bowls, approximately 80 percent went to the one to which the experimenter had pointed. Whether the researcher had pointed to the bowl briefly or repeatedly did not seem to matter. This response, according to the study authors, suggests that untrained stray dogs are “capable of following complex pointing cues from humans.”
Dogs share an intertwined evolutionary history with humans, with domesticated pooches emerging at least 10,000 to 15,000 years ago, though some experts have argued for an even earlier date. This close contact has prompted dogs to develop a number of skills that allow them to communicate with people, including interpreting human emotion. Still, Bhadra says, the researchers found it “quite amazing” that stray dogs without a history of close human interaction were able to “follow a gesture as abstract as momentary pointing.”
“This means that they closely observe the human, whom they are meeting for the first time, and they use their understanding of humans to make a decision,” Bhadra adds. “This shows their intelligence and adaptability.”
Because some dogs seemed anxious and were wary of approaching the researchers, it’s not clear how a dog’s personality—and past experiences—might affect its ability to interpret human signals. But this ability does not appear to be entirely dependent on training, the study authors say, which in turn should inform efforts to manage stray dogs.
“They are quite capable of understanding our body language and we need to give them their space,” Bhadra says. “A little empathy and respect for another species can reduce a lot of conflict."