Probiotics for Horses: What Are They and How Do They Impact Equine Health?
Probiotics for Horses: Understanding Gut Health and Digestion
Summer is long gone, and with it, the grazing season and access to lush green grass have vanished. To make matters worse, stable hay reserves often decline in quality by late winter. It’s time to look at our horses' health from a different perspective. While nutrition is a frequent topic, recent years have seen a surge in research regarding probiotics for horses and their essential role in equine wellness.
Prebiotics vs. Probiotics: What’s the Difference?
Prebiotics: These are non-digestible compounds (oligosaccharides like inulin) that serve as "food" for beneficial bacteria. They selectively stimulate the growth of healthy gut microflora.
Probiotics: These are live microorganisms (yeasts like Saccharomyces and bacteria like Lactobacillus) that, when administered in adequate amounts, confer a health benefit on the host.
The Equine Digestive System: A Delicate Balance
Horses are hindgut fermenters. They digest cellulose with the help of a complex ecosystem of bacteria, fungi, and yeasts residing in the cecum. In an ideal situation, this system is in balance. However, high-starch diets (oats) lower the gut pH, causing beneficial microbes to die off and allowing pathogens to thrive. This imbalance can lead to gastric ulcers, chronic diarrhea, and potentially fatal colic.
When to Use Probiotics for Horses?
Dysbiosis (microflora imbalance) occurs due to:
Sudden dietary changes or low-fiber diets.
Antibiotic therapy (which depletes both good and bad bacteria).
Stress factors such as transport or competition.
Key Benefits: Performance and Recovery
Supplementing with probiotics improves nutrient absorption and B-vitamin production (B6, B12), essential for red blood cell formation and energy levels. In lactating mares, probiotics have been shown to increase milk production. If your horse becomes lethargic, increasing grain may only worsen the acidity; instead, stabilizing the gut with probiotics often addresses the root cause of the problem.