Canine Temperament – An Opportunity for Growth

I have been told I am opinionated.

I have been told I should write a book with all of my opinions.  A “Life According to Stephanie” autobiography chronicling all of the many opinions and beliefs I hold.  My father was the one who suggested this new career path, and, unfortunately for me, I don’t think his motivation was derived from my intelligence or captivating prose.  If I remember correctly it was suggested during one of our many debates during which I was trying to teach him something.  Sigh.

What I have learned in my adult years is that life experience has a funny way of humbling you.  Of causing you, at times, to consider certain strongly held beliefs and question their accuracy.  (Dad nods)

The 18 months I spent with my Linus, my Sweet Baboo, did just that for me.

[Read Life With An Aggressive Dog: A Letter To My Sweet Baboo]

It was during those 18 months and the years after that I have been exploring the question Nature or Nurture as it relates to canine temperament.

Canine Temperament – My Life Experience

Not a day goes by that I don’t think about Linus.  Not one.  I am reminded of him on every car ride, on every walk, and every minute I am out in public with Sulley or Junior.  PTSD?  Perhaps.

Something as simple as driving up the road to the event grounds of a recent dog show with Junior would have sent Linus into a frothing frenzy.  Being stopped by kind admirers who wanted to say hello to Junior would have resulted in one of two reactions from Linus, completely dependent on whether or not those kind people had a dog with them.  Dog shows were generally safe with Linus, anywhere else required a muzzle.  And going through a drive-thru for a hamburger treat for my handsome Winner’s Dog would have been out of the question with Linus.

Linus and Junior were nurtured.  They are loved.  They were both trained at the same place, took handling class from the same instructor, lived across from the same neighbors, enjoyed the cushy comforts of the same beds, and received love from the same two kids.  The only discernible difference between these two dogs, with the exception for how they were raised as puppies in the breeders’ home, is their pedigree.

This has been my life experience.  However, an “n” of one is insufficient to thoughtfully explore the question of nature or nurture and the subject of canine temperament.  So I set out to see what others in the big dog community had to say.

Canine Temperament Facebook Survey

I reached out to several large breed Facebook groups posing the following question:

What do you think? Is canine temperament PRIMARILY driven by:

Nature (Genetics) or Nurture (Upbringing)? 

I removed the ability for participants in the poll to add a metric and forced them to choose either nature or nurture.  The results were quite eye opening.

Interestingly, in the two Mastiff Groups and the Great Dane Group,  on average three-quarters of the respondents said that nurture or a dog’s upbringing was the primary driver of canine temperament, while on my personal Facebook page it was the exact opposite with 71% saying nature was the primary driver of canine temperament.

Because I predicted this would be a difficult question for people to answer definitively, I purposefully didn’t include a “BOTH” option.  While I have no way of knowing how many people simply chose not to respond because they couldn’t choose one over the other, I did have a total of 36 people who commented that they felt BOTH nature and nurture were equal drivers of canine temperament. Many of these people said that they couldn’t choose between the two options so they didn’t vote.

As interesting as these results are, I do wonder whether the results would have been different had I posted this poll in a few other breed groups; Newfoundland, German Shepherd or Saint Bernard owner groups for example.  In addition, because so many respondents said “BOTH,” I wonder if over time the numbers would gradually converge at a 50%/50% split between nature and nurture.

Had I taken this poll 10 years ago, I would have answered “nurture” with the majority without hesitation.

“I think both..but more of the upbringing then anything else…it’s not the dog…it’s the owners!!!”


“I think it is both. Nurture brings out the characteristics nature placed there”


“I think nurture has a lot to do with it but so do genetics. I don’t think I could vote for one or the other they both play into it. Just like with kids.”


“Temperaments are genetic, behavior is learned.”

Todd Christensen

Jadem Mastiffs

What the Experts Say About Canine Temperament

I recently came across two fascinating research studies that I think are both compelling and seemingly definitive in answering the question of nature or nurture as it relates to canine temperament.


Russian Fox Experiment

The first is the Russian Fox Experiment which was started in 1959 by geneticist Dmitry Belyaev and the Institute of Cytology and Genetics.  This four decades long experiment sought to examine the difference between tameness and domestication of silver foxes in Siberia.

From the Domesticated Silver Fox website:

“If you were to gain access to a lion cub, you may be able to raise it to be friendly towards humans and other animals. But, that lion’s offspring would be as aggressive as it’s wild African ancestors if not tamed in it’s early years. Also, there is still a slim chance that your own tamed lion could attack.  It’s still a wild animal, no matter what.  Domestication, on the other hand, is a slow process in which each generation of an animal grows closer to humankind, a trait that Belyaev believed was written in the creatures’ genes.”


Belyaev used selective breeding in this experiment.  He used a fox’s response to humans (tameness) as the sole determining factor and only bred the top 4 – 5% tamest foxes.  The resulting kits were all raised the same, without much interaction with humans other than during the tests themselves.  Here is a summary of the results:

  • 2nd Generation: Approachability increased. Foxes aggression started to disappear and was completely gone by the 3rd
  • 4th Generation: Foxes started to wag their tails and approach humans voluntarily. Started to allow humans to pet and carry them.
  • 6th Generation: Foxes started to follow humans and even lick them like dogs.

In addition to observing changes in the animals’ neurochemical and neurohormonal mechanisms, the ultimate conclusion that Belyaev came to as it relates to fox behavior was that the difference between tame and aggressive foxes was almost entirely genetic.  Click here for a great video summary of Belyaev’s work.

Canine Temperament and Dogs Decoded

Another terrific exploration of canine temperament is in the PBS NOVA documentary Dogs Decoded.

The fact that wolves and dogs are 99.8% genetically identical caused Hungarian researchers to try and answer the question “Is it the way we raise them [nurture], that makes a DOG?” They wanted to find out whether the special relationship we have with our dogs was due to nature or nurture.

Researchers took a litter of 5 day old wolf cubs from a Wolf Sanctuary in Budapest and raised them in human homes with their new adoptive parents caring for them 24 hours a day.  The humans carried the cubs everywhere and bonded with them as they did with the control group of domesticated puppies.  With the exact same upbringing, wolf cubs started to trend toward wild wolves as early as 8 weeks old.  The wolves lacked the cooperative and social skills that were seen in the puppies, they disengaged through their body language and lack of eye contact when presented with toys and other stimuli that attracted the puppies, they showed extreme possessiveness over things they wanted, and they were increasingly destructive.  By four months old the wolf cubs were returned to their pack due to the increasing risks of keeping them in the home.

The conclusion Hungarian researchers drew from this study was that it is “impossible to turn a wolf into a dog no matter how much he is loved and nurtured.” They determined that what makes a dog, a dog, is the years of domestication by humans.

My Conclusion – Canine Temperament is NOT a Zero Sum Game

While I do believe the results from the two experiments I just summarized are abundantly clear, that it is in fact nature, not nurture, which is the PRIMARY driver of canine temperament, one doesn’t necessarily discount the importance of the other.

I have no doubt that the folks who voted for “nature” in my Facebook survey also believe that early training and socialization of puppies is absolutely critical to their development.  And that those that voted for “nurture” also believe in the importance of finding a quality, reputable breeder.   My own writing here on this blog affirms my stance on both:

So many of us have witnessed the devastation of a “normal” puppy being “ruined” by a cruel or uncaring environment.  It is often these dogs who are able to come back from a horrendous upbringing and with love, desensitization, training, and a nurturing environment to be healthy, well-adjusted canine good citizens.

In spite of the evil that has been inflicted on them, they are able to overcome the odds stacked against them.

The question is, what if that puppy were not “normal” but the result of years of breeding poor temperaments?  Would the same amount of nurturing have the same positive effect?


My last point is this.

Can a puppy who is born from parents (and grandparents) with questionable temperaments go on to live an otherwise “normal” life?  Possibly.  The litter that Linus was born into proves that that is true.

However, what happens when those questionable temperaments go on to breed more questionable temperaments.  How is this any different than, instead of selecting for tameness, Dmitry Belyaev selected for aggression, or fear, or timidity?  Is that not what breeders are in fact doing when they are breeding dogs with questionable temperaments?

My objective with this post was to share my thoughts, some interesting research and, in the end, to encourage those of you who use the safety net of good nurturing to excuse poor breeding practices, to reconsider your stance.

I warned you I was opinionated.

[This one is for you, Dad.]

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Nature Versus Nurture and the Drivers of Canine Temperament ultima modifica: 2017-12-06T20:07:08+00:00 da BigDogMom
Nature versus nurture is an age old question, but as it relates to the drivers of canine temperament, there is an answer. #BigDogMom #NatureVersusNurture #CanineBehavior #DogScience   Temperament / Canine Behavior / Dog Behavior / Dog Behavior Explained