🌦️ Vet Alert 2025: How Barometric Pressure Changes May Trigger Colic in Horses 🐴⚠️

Author: Dr Duncan Houston, BVSc

Horse owners and veterinarians have long noticed a strange pattern: colic episodes spike when the weather changes. Now, scientific data is beginning to explain why. Barometric pressure—a key factor in weather systems—has a measurable impact on equine gastrointestinal health. In this 2025 update, Dr Duncan Houston explains how shifting weather can disrupt your horse's gut and what you can do to help. 🌪️🐎

🔬 What the Research Says

A study from the University of Pennsylvania investigated the role of barometric pressure changes in the onset of equine colic. The findings revealed a strong correlation between falling atmospheric pressure and increased risk of colic. 📉🌬️

Key Findings:

• 📆 Older horses have a slightly higher risk of colic
• 📍 Colic risk doubles for every degree of latitude moving north
• 📉 A barometric pressure drop within 12 hours increases colic risk by 2.5 times

As the seasons shift—especially in spring and fall—pressure changes can be dramatic, and the frequency of colic cases rises accordingly. 🌍

📈 Why Does Pressure Affect the Gut?

While the exact mechanism is not fully understood, several theories exist:

• 💧 Horses drink less water during cold snaps or stormy weather
• 🍂 Drier ingesta leads to impaction colic
• 🔁 Sudden changes in management (feeding, turnout, exercise) add stress
• ⚙️ Pressure changes may affect intestinal motility or gas buildup

The result? A perfect storm of physical and environmental stress that can leave your horse vulnerable to abdominal discomfort or blockage. 🧬

🌍 The Role of Geography

Interestingly, the research showed that horses in northern latitudes are at higher risk for colic due to greater climate variability:

• 📍 Colic risk doubles for every degree north of the equator
• 🌦️ More frequent and dramatic pressure swings = more stress on the horse

If you live in areas with cold winters, wet springs, or fast-moving weather fronts—monitor your horses closely during pressure drops. ❄️🌪️

🛠️ 2025 Management Tips During Weather Shifts

• 💧 Ensure constant access to fresh water—even in cold weather
• 🍽️ Feed wet, fiber-rich forage (like soaked beet pulp or alfalfa cubes)
• 🏃 Maintain consistent turnout and exercise routines
• 📆 Avoid sudden changes in feed or schedule
• 🩺 Monitor for colic signs 12–24 hours after a major pressure drop

Common signs of colic include:

• 🥵 Pawing or rolling
• 🥕 Lack of appetite
• 💩 Reduced or no manure production
• 💥 Looking at flanks or kicking at belly

🧠 Dr Duncan Houston’s Advice

"Horses are sensitive to pressure changes. It’s not just the weather—it’s the water, the routine, the stress. Watch carefully during big fronts." 🐴🩺

⚠️ When to Call the Vet

If your horse shows persistent discomfort, abnormal gut sounds, or isn’t passing manure during a weather change, contact your vet immediately. Fast action prevents severe colic complications. 🆘

🔚 Final Thoughts: Weather the Weather Wisely

Understanding the link between barometric pressure and colic gives horse owners a powerful tool: anticipation. By adjusting your care routine during weather shifts, you can prevent colic before it starts—and keep your horse happy, hydrated, and healthy. 🐎💧

Need help creating a weather-smart care plan? Visit AskAVet.com or download the Ask A Vet app for expert equine support—rain, shine, or storm. 📱🌧️