Dogs, But Not Pigs, Look to People for Help with a Problem

Even when the miniature pigs have been raised just like pet dogs. Is this why dogs are so special? Video included.

A pig takes part in the research on help-seeking behaviour in pigs and dogs
A pig called Borso takes part in the experiment. Photo: Paula Pérez


By Zazie Todd, PhD

Every dog owner has probably had a situation where their dog has looked to them for help, perhaps when a coveted ball or treat has ended up out of reach under the sofa. Is this something special about dogs and their relationship with us? Research already shows that wolves (not domesticated) don’t do this, and nor do cats (domesticated, but not a social species in the same way as dogs). So what about pigs? 

Pigs are both domesticated and social as a species. And individual pigs are especially friendly if they have been reared just like pet dogs are. This is the case for the miniature pigs at the Family Pig Project at Eötvös Loránd University in Hungary. New research from the Department of Ethology at the university, published today in Animal Cognition, compares pigs to dogs when it comes to help-seeking behaviour.

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10 juvenile pigs and 12 young dogs, all around 7 months of age, took part in the study. All of them (dogs and pigs) had been brought up in family homes from around 8 weeks old. 

The scientists used something called the unsolvable task paradigm. Each animal was tested individually in the lab at the university. At first, they could see an upturned see-through plastic container with the lid not attached. Then, food was placed in the plastic container such that it was easy for them to remove the lid and get the food. But after doing this a few times, the scientists changed the set-up: now the lid was fixed in place, making getting at the food an unsolvable task. 

A dog takes part in the unsolvable task
A dog looks to the experimenter in the unsolvable task. Photo: Paula Pérez


The food used was pieces of apple or dog food for the pigs, and pieces of sausage for the dogs. Both the owner and an experimenter were present in the room during the tests.

Dr. Linda Gerencsér, research fellow in the department says, 
“When the box was first in the room without food in it, pigs and dogs performed similar human-oriented behaviours, The differences appeared when we put food in the box and opening it became an exciting challenge. Pigs were faster than dogs already in solving the task and getting the reward, perhaps due to their better manipulative capacities. Then, when the task became unsolvable, dogs turned to the humans more than before. In contrast, pigs performed less human-oriented behaviours, but they were more persistent than dogs in trying to solve the task, which may reflect their predisposition to solve problems independently.”

A pig relaxes at home as part of the Family Pig Project
The pigs were raised just like pet dogs. Photo: Kristof Wirth


In addition, during the unsolvable part of the study, both dogs and pigs spent more time oriented to the experimenter than to their owner.

PhD student Paula Pérez says, 
“The similarities that we found between the two species point to their similar capacities for engaging in communicative interactions with humans. However, species-specific predispositions might be responsible for the found differences. Dogs are naturally more dependent on and cooperative with humans. This explains their unique success in interacting with us.”

The researchers made a short video about the study.  


There are several possible explanations, as the different anatomy of pigs, the fact that the task seems suited to their normal rooting behaviour, or differences in food motivation cannot be ruled out. There may also have been some differences in socialization, especially prior to the animals joining the project at 8 weeks. But the scientists think these results reflect the unique abilities of dogs.

Pigs are not the only farm animal to have been tested in an unsolvable task paradigm. Earlier research with goats (Nawroth et al 2016) has shown that they are sensitive to whether or not a person is looking in their direction. And in this new research, the results from both pigs and dogs are fascinating. As more people keep miniature pigs as pets, they will be interested to see future work on the unique cognitive abilities of pigs too. In the meantime, if your dog is looking at you, maybe they need help with something.

You can follow the Family Dog Project on Twitter and Facebook.
 
If you have a dog or a pet pig, what are the situations in which they seem to look to you for help?


Zazie Todd, PhD, is the best-selling author of Wag: The Science of Making Your Dog Happy. She is the founder of the popular blog Companion Animal Psychology, where she writes about everything from training methods to the human-canine relationship. She also writes a column for Psychology Today and has received the prestigious Captain Haggerty Award for Best Training Article in 2017. Todd lives in Maple Ridge, BC, with her husband and two cats.

Useful links:
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References
Nawroth, C., Brett, J. M., & McElligott, A. G. (2016). Goats display audience-dependent human-directed gazing behaviour in a problem-solving task. Biology Letters, 12(7), 20160283.
Pérez Fraga, P., Gerencsér, L., Lovas, M., Ujvary, D., and Andics, A. (2020) Who turns to the humans? Companion pigs’ and dogs’ behaviour in the unsolvable task paradigm. Animal Cognition.

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Comments

  1. Thanks for providing informative - and fun - information. It's always interesting, and often smile-inducing.

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  2. Excellent as always! Thank you!

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  3. My dog looks to me for help when a ball or treat rolls under the couch. A fascinating study. Thank you for sharing.

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  4. Interesting study! Could also the fact that dogs and humans work together for ages have something to do with the outcome? We also live with pigs for ages, but they may be less selected on cooperative behaviour. In that regard, I would like to see how horses perform in this kind of task.

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