January 13, 2026 3 min read
| Parameter | Typical Grass Hay (Second Cut / Reduced Starch) |
Cowboy Complete Hay Replacer (Low Starch) |
|---|---|---|
| ADF | 35–45% High indigestible fiber | ~23–25% Reduced waste, reduced “dead gut weight” (indigestible fiber). 30-35% less waste or gut weight. |
| NDF | 60–70% Bulky, limits intake | 31-37% Moderate & health-promoting. Maintains gut fill without overload. |
| TDN | 50–55% Low usable nutrition | 62–68% Higher digestible nutrition |
| Result in the horse and impact on the environment |
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ADF (Acid Detergent Fiber)
The higher this number, the more undigestible the hay is for the horse. ADF refers to the portion of fiber in forage that is indigestible to horses. High ADF levels contribute to increased gut fill, commonly known as “hay belly,” and add non-nutritive weight. This can elevate the risk of impaction colic, reduce athletic performance, and slow the horse’s movement. ADF is composed of cellulose, lignin, and silica—components that are difficult or impossible for equine hindgut microbes to break down, with lignin being essentially indigestible.
NDF (Neutral Detergent Fiber)
NDF represents total plant cell wall fiber, including Hemicellulose (more digestible), Cellulose and Lignin (indigestible). NDF is not inherently bad. It tells you how much fiber there is, not how digestible it is. To estimate digestible fiber, nutritionists look at lower ADF within a moderate NDF range OR use derived values like TDN (Total Digestible Nutrients). For horses, fiber is essential, but lower ADF within an appropriate NDF range means more usable fiber.
TDN (Total Digestible Nutrients):
The higher this number, the more nutritious is the hay to the horse.
There are many more benefits in feeding Cowboy Complete. One is the reduction of dust, your horse can breathe cleaner air, and you as well. Another one is the health-promoting feature from natural antioxidants, Vitamin K, Vitamin E and CoQ10.
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Cowboy’s Choice Premium Horse Feed makes nutrition simpler with a low-starch, fat- and fiber-driven formula designed around the way horses naturally digest. Our forage-based feeding system supports efficient digestion and a balanced hindgut, helping horses get more from their feed while supporting gut health, muscle development, and steady, cool energy for performance—without unnecessary stress on the digestive system.
Give your horse the nutrition nature intended—find your Cowboy’s Choice dealer today.