A study spanning 93 countries has found that nations with more domestic cats tend to report higher happiness, while greater exposure to the parasite Toxoplasma gondii is associated with lower scores. The findings, published in PLOS One, reveal intriguing connections—but they do not show that cats directly make people happier or that cat ownership increases infection risk.
Key takeaways
- Countries with higher cat density tended to report higher national happiness.
- Greater exposure to T. gondii was linked to lower happiness scores.
- The country-level findings cannot explain what causes happiness or predict an individual owner’s experience.
The results bring together pet ownership, public health and economic conditions, and point to questions that need further research.
What the researchers found
Researchers compared national happiness data with cat density, economic measures—including income and GDP—and estimates of T. gondii exposure across 93 countries. The parasite can infect people and is associated with cats, though other routes of transmission exist.
The analysis found a positive association between cat density and happiness, and a negative association between parasite exposure and happiness. Some economic indicators were also positively associated with well-being. The researchers stressed that these patterns are correlations, not evidence that cats cause happiness or that infection causes lower happiness.
Why more cats did not mean more parasite exposure
The researchers also found that countries with more cats tended to have lower, not higher, T. gondii exposure—a counterintuitive result. Cat numbers alone may not determine human exposure: pet-care practices, sanitation, public health and socioeconomic conditions could all shape the relationship.
For example, cats in wealthier settings may be more likely to live indoors, receive veterinary care and eat commercial food. Those factors are possible explanations, not conclusions established by this study.
What this means for cat owners
National averages cannot tell an owner whether their own cat will improve their well-being, nor do they explain how a particular cat is feeling. A cat’s comfort still depends on its individual needs and surroundings. Hiding, conflict, spraying or changes in appetite can signal stress, rather than deliberate misbehaviour.
PAWSONA’s cat-behaviour approach focuses on identifying and addressing those underlying stressors. Practical steps—such as providing quiet resting places, predictable routines and separate resources in multi-cat homes—can help create a more comfortable environment. Calming products, including pheromone diffusers, may be one support, but should not replace investigating what is troubling a cat.
What researchers want to learn next
The study’s country-level design cannot determine whether cat owners are happier than non-owners, or how an individual’s well-being changes over time. Differences between countries may also be influenced by factors the analysis did not capture. The authors call for longitudinal and interdisciplinary research that examines social, economic, biological and ecological influences together.
For now, the findings broaden the conversation about national well-being, but they are not a prescription to get a cat. They underline that human and animal health are shaped by more than one factor—and that association is not proof of cause and effect.
- More cats: The key to happy countries?, Phys.org.
- Scientists Find a Surprising Link Between Cats And Happiness Across 93 Countries : ScienceAlert, ScienceAlert.
- Countries with More Cats Report Higher Happiness, Scientists Say, Sci.News.
- Wealth and health aren’t the only indicators of national happiness – there’s also cats!, EurekAlert! Science News Releases.
- Countries with more indoor cats are happier, but there’s a catch, The Independent.