Genes & Dog Behavior & Temperament: Nature or Nurture?

Dr. Monticha Kitnitchee profile image Written by
Dr. Monticha Kitnitchee
|
Jun 30, 2026
|
181
Health
Genetics
dog behavior genetics
Summary
dog behavior genetics

Why does a Border Collie herd? Why does a Retriever carry things? These behaviors come partly from genes — but not entirely. Learn how genetics and upbringing together shape your dog's personality.

Key Takeaways

  • A dog's temperament comes from both genetics and upbringing together.
  • Breed influences behavioral tendencies, such as herding, hunting, or guarding.
  • But genes are only a "tendency," not a fixed destiny — training and environment matter a lot.
  • Understanding the genetic basics helps you choose a dog and plan training that suits each individual.

Why does a Border Collie want to herd everything in the house? Why does a Retriever love to carry things? These behaviors come partly from genes — but not entirely. Let me explain how much genetics relates to temperament.

Does Temperament Come From Genes or Upbringing?

The answer is both. Research shows many dog behaviors have a genuine genetic component, but upbringing, training, and early-life experiences (socialization) play an equally important role. Genes set the foundation, while the environment shapes how that foundation is expressed.

Breed and Behavioral Tendencies

Each breed was selectively bred for different jobs, so they have different behavioral tendencies. Herding dogs often have a strong chasing instinct, hunting groups are sensitive to scent and movement, and guarding breeds tend to be watchful. However, these are average tendencies — each dog still has its own personality. This connects with dog breeds and ancestry, dog breed DNA testing.

Genes Are a Tendency, Not a Fate

What I want to emphasize is that a dog being a certain breed doesn't mean a fixed personality. Two dogs of the same breed can have very different temperaments depending on upbringing and training. Some research even finds breed predicts individual behavior less than many people think. Judging a dog by "breed" alone isn't always the answer.

How to Use This Understanding

Knowing behavioral tendencies helps us prepare and plan training suited to the dog — for example, high-energy dogs need lots of activity, and dogs sensitive to stimuli may need good socialization training. Understanding your dog makes the relationship smoother and keeps them happy. 

The Vet's Final Note

Your dog's temperament is a beautiful blend of genes and the love we give. Understanding the genetic basics helps us be better owners, but don't forget that nurturing with understanding is what shapes them most. If you'd like to know your dog more deeply, feel free to consult the Geneus Pet team.

1. Does a dog's temperament come purely from genes?

Partly true, but genes are only a tendency. Upbringing, training, and environment shape the final temperament just as much.

2. Can I accurately predict temperament from breed?

No. Breed only indicates average tendencies; same-breed dogs can still have very different personalities depending on upbringing.

3. How does knowing behavioral tendencies help?

Yes. Knowing behavioral tendencies helps us plan training and activities suited to each individual dog.

References

  1. MacLean EL, Snyder-Mackler N, vonHoldt BM, Serpell JA. Highly heritable and functionally relevant breed differences in dog behaviour. Proceedings of the Royal Society B. 2019;286(1912):20190716. Royal Society
  2. Morrill K, et al. Ancestry-inclusive dog genomics challenges popular breed stereotypes. Science. 2022;376(6592):eabk0639. Science
  3. Ilska J, Haskell MJ, Blott SC, et al. Genetic Characterization of Dog Personality Traits. Genetics. 2017;206(2):1101–1111. Genetics (OUP)
Written by Dr. Monticha Kitnitchee
chat line chat facebook