The horse's digestive system, particularly the hindgut, functions as a massive "fermentation chamber." When the balance of this chamber is disrupted by competition stress, travel, or high-grain diets, the horse faces issues ranging from decreased performance to severe diarrhea.
The use of Active Live Yeast—as opposed to common inactive feed yeast—is the key.
Mechanism: Upon reaching the gut, the live yeast activates and consumes excess oxygen, creating an ideal anaerobic environment for beneficial bacteria.
pH Stabilization: It prevents a drop in pH (acidosis). Acidosis is the primary culprit behind irritability, back tension, and poor hoof quality.
Benefit: The horse remains calm, with a healthy digestive tract and maximum nutrient absorption.
Prebiotics are not live organisms, but specialized carbohydrates that support the existing flora.
MOS (Mannan-oligosaccharides): These act as "pathogen magnets." They bind harmful bacteria (such as Salmonella and E. coli) and remove them from the body through manure before they can cause inflammation.
FOS (Fructo-oligosaccharides): These serve as exclusive "food" for beneficial microorganisms (Lactobacilli). They increase the digestibility of hay fibers, allowing the horse to maintain weight even during intense training.
In cases of acute or chronic diarrhea, the action of this combination is catalytic:
Immediate Repopulation: Live yeast "crowds out" the pathogens causing the diarrhea.
Fluid & Electrolyte Retention: By stabilizing the flora, the gut regains the ability to absorb water correctly, stopping the fluid loss that leads to dehydration.
Post-Antibiotic Recovery: Antibiotics kill both good and bad bacteria. Administering Live Yeast with MOS/FOS is essential to "rebuild" the gut from scratch.