The Ultimate Guide to Horse Forage Analysis: Ensuring Optimal Health with Hay & Haylage
Forage, including hay and haylage, makes up 80 to 100 percent of a horse’s diet, yet many owners still choose hay based only on its appearance.
The problem is that not all hay is created equal. A bale may look green and smell fresh but still hide issues like high sugar levels, low protein, or mineral imbalance. That’s why a proper horse forage analysis is essential if you want to feed your horse with confidence.
This guide will walk you through why hay analysis matters, what the numbers mean, and how you can use the results to build an optimal diet for your horse.
1. Why Is Forage Analysis Crucial?
Visual Inspection Isn’t Enough
While color and smell can reveal mold or dust, they do not indicate nutritional value.
A forage analysis can uncover issues like:
- High sugar (ESC) levels, dangerous for metabolic horses
- Low crude protein, limiting muscle development
- Imbalanced minerals affecting bone health and performance
Nutrition Impacts Performance
Whether your horse is a family companion or a high-level competitor, balanced forage nutrition supports energy levels, recovery, and overall performance.
2. What Does a Forage Analysis Test For?
Here are the key components of a hay analysis for horses and what they tell you.
Dry Matter (DM)
Hay is typically 85–90% dry matter, while haylage ranges from 50–70%. DM tells you how much of the forage is actual feed versus water.
Digestible Energy (DE)
Measured in Mcal/kg, DE indicates how much usable energy your horse gets from the forage.
Crude Protein (CP)
Protein is essential for muscle development, growth, immune support, and tissue repair.
Fiber (NDF & ADF)
NDF affects how much the horse will eat, while ADF tells you how digestible the forage is. Lower ADF means more digestible hay.
Sugars & Starches (ESC & Starch)
High sugar hay can cause dangerous spikes in blood glucose, especially for horses with EMS, PPID, or laminitis history.
Minerals
Commonly measured minerals include Calcium, Phosphorus, Magnesium, Potassium, and Sodium. Balanced minerals are essential for nerve function, muscles, bones, and metabolism.
3. How to Take a Proper Forage Sample
Step-by-Step Sampling Guide
- Use a hay probe for the most accurate results.
- Take samples from 10–12 different bales for a representative average.
- Core each bale from the center, not the sides.
- Combine the samples and mix them thoroughly.
- Send the sample to a certified forage testing laboratory.
4. Reading the Report – Made Simple
A forage analysis report may look complicated, but once you understand the basic terms, it becomes a powerful tool for building the perfect diet.
Match your hay’s nutritional profile with your horse’s needs. For example, performance horses often require higher protein and energy, while metabolic horses need low sugar forage.
Understanding your forage needs helps you match the right horse to the right diet. Browse our performance horses for sale.
A horse forage analysis is one of the most valuable tools for responsible horse ownership. When you understand the nutritional value of your hay, you can feed with confidence and support your horse’s long-term health.
Ready to find a horse that matches your management style?
Check out the latest listings on Forequestrian.com.
Frequently Asked Questions
How often should I test my hay?
Ideally, you should test each new batch or cutting of hay, as nutritional values can vary significantly.
Is hay analysis necessary for all horses?
While every horse benefits from balanced nutrition, it’s especially important for metabolic horses, seniors, broodmares, and performance horses.
Can soaking hay replace forage analysis?
Soaking reduces sugars but does not replace analysis. You still need to know baseline levels to make informed feeding decisions.
Where can I send hay for analysis?
Most regions have certified agricultural or equine-specific laboratories. Search for local forage testing labs or contact your vet for recommendations.






