A scientific study titled “Gut microbiota composition is related to anxiety and aggression scores in companion dogs” aimed to investigate whether the composition of gut microbiota in our four-legged friends could be linked to behaviors such as anxiety and aggression. Previous research suggested a connection between microbiota and mental health in humans and animals. This study aimed to explore this relationship in companion dogs living in a stable environment away from the stressful effects of a shelter.
Researchers asked 494 owners to fill out a detailed questionnaire about their dogs’ diet, lifestyle, and behavioral issues. Among them, 235 owners provided additional information through the Canine Behavioral Assessment & Research Questionnaire (C-BARQ), a recognized tool for evaluating canine behavior. Based on the responses, dogs were classified into groups with varying levels of anxiety and aggression.
The scientists collected stool samples from 50 dogs to analyze their microbiota. DNA sequencing techniques were used to identify bacteria in their intestines. The results were analyzed using machine learning models to detect possible correlations between microbiota composition and observed behaviors.
Zooming in on the bacteria, the study found that a bacterium called Blautia played an important role in canine behavior. The more prevalent Blautia was in a dog’s gut, the more likely they were to be anxious. Other bacteria, such as those from the Oscillospiraceae and Firmicutes families, were also associated with anxiety or aggression.
The research suggests a link between dogs’ gut flora and their behavior, offering practical perspectives for managing undesirable behaviors. Understanding how intestinal bacteria influence emotions could lead to personalized approaches for treating behavioral issues in dogs. By considering the gut microbiota in recommendations, veterinarians may offer more comprehensive and tailored solutions.
Taking care of dogs’ intestines could improve their emotional balance, ultimately supporting their well-being. This recent study sheds light on the crucial role of gut microbiota in the health of our furry companions. It highlights how attending to their intestines can enhance their emotional well-being and potentially revolutionize the way we support the health and well-being of our beloved animals in the future.
(Source: Nature, article number 24336, 2025)
