Researchers at the University of Cambridge have uncovered new insights into the emotional lives of dogs, helping to explain why some Golden Retrievers are more anxious, energetic or aggressive than others.
Their research is Proceedings of the National Academy of Sciencesdemonstrated for the first time that certain genes associated with dog behavior are also associated with human traits such as anxiety, depression, and intelligence.
Genetic clues behind golden retriever personality
To investigate the biological roots of dog temperament, scientists examined the DNA of 1,300 golden retrievers and compared it to each dog’s behavioral profile. Owners provided detailed survey responses describing their pets’ habits and reactions. The researchers then matched this behavioral data with each dog’s genetic information.
This analysis revealed specific genes associated with traits such as trainability, activity level, fear of strangers, and aggression towards other dogs.
When the researchers compared these results with human genetic studies, they found that 12 of the genes associated with Golden Retriever behavior were also associated with emotional traits and behavior in humans.
“The results of this study are truly surprising and provide strong evidence that humans and golden retrievers share the genetic roots of their behavior. The genes we have identified frequently influence emotional states and behaviors in both species,” said Dr. Eleanor Laffan, a researcher in the Department of Physiology, Development and Neuroscience at the University of Cambridge, who led the study.
One gene, called PTPN1, stood out. In golden retrievers, it was associated with aggression towards other dogs. In humans, the same genes are linked to intelligence and depression.
Researchers have also identified another genetic mutation that appears in golden retrievers that are fearful of other dogs. For people, this mutation influences whether they tend to persist in embarrassing experiences or have high educational success.
Scientists say these findings could help dog owners better understand their pets’ emotional responses and tailor training and care to individual needs.
“These results show that genetics governs behavior and that some dogs are predisposed to finding the world stressful. If their life experiences exacerbate this, they may behave in ways we interpret as bad behavior when they are actually distressed,” said Enoch Alex, a researcher at the University of Cambridge’s School of Physiology, Development and Neuroscience and lead author of the report.
Dog training and implications for veterinary medicine
The study also identified a link between golden retrievers’ training ability and a gene known as ROMO1. In humans, this gene is associated with intelligence and emotional sensitivity.
Because of these connections, researchers say there may be more to dog training than simply reinforcing desired behaviors. A dog’s emotional state may also play an important role in how easily they learn.
This discovery could also have implications for veterinary medicine. For example, recognizing that certain fearful behaviors result from anxiety-related genetic factors may lead to the use of treatments to reduce stress.
How genes shape behavior and emotions
The genes identified in research do not directly cause specific behaviors or emotions. Rather, it affects a wide range of systems that regulate mood and behavioral responses.
One example is a dog that exhibits “non-social phobias” (fear of things like buses and hoovers). Researchers discovered a gene associated with this trait, which in humans is associated with irritability, emotional sensitivity, and “visiting a doctor for nervousness or anxiety.”
Dr Anna Moroz-Nuevo, a researcher in the University of Cambridge’s School of Physiology, Development and Neuroscience who also took part in the study, said: “If your golden retriever crouches behind the sofa every time the doorbell rings, you might be a little more empathetic if you knew that he was genetically sensitive and prone to anxiety.”
“Our domestic dogs not only share our physical environment with us, but they may also share some of the psychological challenges of modern life. Our pets may be good models for some of the human mental conditions associated with emotional disorders,” said Professor Daniel Mills, an expert in problem animal behavior at the University of Lincoln, who also took part in the study.
The relationship between dog behavior and DNA
The study was based on behavioral data from 1,300 Golden Retrievers between the ages of 3 and 7, part of the Golden Retriever Lifetime Study, a project run by the Morris Animal Foundation since 2012.
Pet owners participating in this study complete a detailed questionnaire covering 73 different behaviors. These responses are grouped into 14 categories to help researchers measure specific behavioral traits.
Scientists combined this information with blood samples taken from the dogs. By scanning the entire genome of each golden retriever, they identified genetic markers that appear more frequently in dogs that exhibit certain behavioral traits. This approach allowed researchers to link different regions of the genome to specific behavioral patterns.
