As global climate patterns shift and urban development encroaches on rural pastures, the environmental factors influencing animal health are coming under closer scientific scrutiny. Among the most pressing concerns for the equine industry is the rising prevalence of equine asthma, a chronic respiratory condition that affects the quality of life and performance of horses worldwide. While veterinarians have long focused on localized stable management—such as hay quality, dust control, and barn ventilation—a new study is looking beyond the stall door to examine how broader regional and climatic conditions influence respiratory health.
Marlene, a veterinary student currently in her final semester, has launched a comprehensive research project aimed at mapping the correlation between a horse’s geographical location and the severity of its respiratory symptoms. Her thesis, which is being supported by the Vet Candy community, seeks to determine whether moving a horse between different climate zones—specifically transitions involving coastal or maritime environments—alters the trajectory of chronic airway inflammation.
Equine asthma, often categorized by wheezing, coughing, and exercise intolerance, is traditionally treated through the lens of individual barn management. However, these localized solutions do not account for macro-environmental stressors. Scientists are increasingly interested in whether high humidity, coastal salinity, or changes in regional air quality act as catalysts for respiratory distress. By investigating the “bigger picture,” this research hopes to move beyond basic stable hygiene and identify if certain climates may be naturally therapeutic or, conversely, exacerbating for sensitive horses.
The scope of the study is intentionally broad, inviting participation from horse owners, veterinarians, riders, stable managers, and breeders. Participation does not require one to own a horse with a formal asthma diagnosis; rather, the research relies on the collective observations of those who interact with horses in various settings. This crowdsourced approach allows for a larger, more diverse dataset that captures anecdotal and clinical evidence across different terrains and management styles.
The necessity for this research is underscored by the changing nature of equine husbandry. As owners increasingly relocate for work or sport, they may inadvertently expose horses to vastly different environmental pathogens or climatic stressors. If the study finds a significant link between regional factors and respiratory health, it could fundamentally change how veterinarians advise clients on equine relocation and management. It could also provide a roadmap for “climate-based therapy,” helping owners choose locations or stable designs that provide the best respiratory support for their animals.
For the veterinary community, this study represents a vital opportunity to synthesize professional experience with emerging environmental data. Student-led research is the backbone of clinical innovation, but it requires industry-wide support to produce actionable insights. By gathering data on the day-to-day challenges of managing respiratory-challenged horses—and identifying the risk factors seen in the field—the project aims to standardize how the industry approaches environmental health.
The researchers emphasize that every submission provides a critical data point in understanding the relationship between the environment and animal biology. The survey is designed to be accessible, taking approximately 5 to 10 minutes to complete. It focuses on identifying which environmental triggers are most prevalent and how current management strategies are adapting to regional climate changes.
As environmental factors continue to impact agriculture and animal welfare, the findings of this thesis could have lasting implications for the equine world. Understanding whether the geography of a pasture is just as important as the quality of its hay will be a significant step forward in ensuring that horses, regardless of their location, can breathe easier.
Those interested in contributing to this research can access the survey here: Equine Asthma and Environmental Influences Survey. By participating, the equestrian community can play a direct role in shaping the next generation of veterinary standards and improving respiratory care for horses everywhere.
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