How To Choose High-Quality Hay for Your Horse

A Practical Guide for Horse Owners

Not all hay is created equal.

Hay can look green, smell decent, and still not be the right feed for your horse.

Most horse owners eventually learn this the hard way, usually after opening a bale that seemed fine until the center was dusty, moldy, or full of coarse stems. And of course, we all know the frustration of paying for hay that ends up trampled into the mud instead of eaten because your horse refused to eat it.

Because hay makes up the foundation of most horses’ diets, quality matters more than many people realize. The right hay supports digestion, healthy weight, energy levels, hoof quality, and overall wellbeing. Poor-quality hay, on the other hand, can contribute to respiratory issues, wasted feed, digestive upset, and higher veterinary costs over time.

And with tighter hay supplies and rising prices in recent years, many horse owners are feeling pressure to buy whatever they can find.

But learning how to evaluate hay is one of the most valuable horse-care skills you can develop.

How to Quickly Evaluate Hay

Good hay should look, feel, and smell fresh.

Look for:

green or greenish color
a clean, slightly sweet smell
soft texture
flexible stems
lots of visible leaves

Avoid hay that is:

moldy
dusty
damp or hot inside
brittle and overly coarse
musty or sour-smelling

If you shake out a flake and see a visible cloud of dust, that hay may not be a safe choice for horses.

Most horse owners have opened at least one bale that looked fine on the outside and completely different once it was broken apart. That’s why it helps to inspect multiple bales whenever possible.

The leaves contain much of the hay’s nutrition, so high-quality hay will usually have more leaves and fewer thick stems. Very stemmy hay is often more mature and less digestible.

That said, softer hay is not automatically better. Horses still need enough fiber structure to support healthy digestion and natural chewing behavior.

Why Hay Quality Matters

At Colorado Horse Rescue, we regularly see how forage quality affects body condition, hoof health, digestion, and long-term recovery in horses arriving from neglect or difficult situations.

Horses are designed to spend much of their day grazing and foraging. In natural settings, horses may spend 12–18 hours each day eating small amounts of forage frequently.

Because horses consume so much hay daily, even small quality issues can add up over time.

Poor Hay Often Increases Costs

Lower-quality hay does not just affect nutrition. It can also increase wasted feed, frustration at feeding time, and overall horse care costs.

A cheaper bale that horses refuse to eat may actually cost more in the long run than better-quality hay with less waste.

For senior horses, hard keepers, and horses with metabolic conditions, hay quality becomes even more important. A horse may maintain weight on lower-quality hay for months before nutritional gaps begin showing up, especially during winter.

Sometimes the First Sign Isn’t Weight Loss

One of the first signs of poor-quality hay is often subtle.

A horse may:

suddenly leave stems behind
start dunking hay in water
develop a dull coat
drink more water than usual
seem bloated but still lose topline
begin coughing only during feeding time

Many horse owners assume these changes are “just seasonal,” when the hay may actually be part of the issue.

Good Hay Isn’t Always the Right Hay

One of the biggest misconceptions in horse care is that “good” hay works for every horse.

Not necessarily.

A rich, leafy alfalfa hay may help a hard keeper thrive, while the exact same hay could cause weight gain or feeding challenges for an easy keeper.

Some horses need:

lower sugar forage
softer hay for dental issues
higher calorie hay
more fiber and less protein

That’s why choosing hay is not just about whether the hay is high quality. It’s also about whether it matches your individual horse.

Finding the right balance often takes observation, adjustment, and sometimes a little trial and error.

Understanding Different Types of Hay

Grass Hay

Common grass hays are timothy hay, orchard grass, and brome.

Grass hay is often lower in calories and higher in fiber, making it ideal for many adult horses. A horse in light work may do beautifully on orchard grass, while a hard keeper heading into winter may need additional calories from alfalfa.

It is important to note that hay grown for cattle is not always suitable for horses. Horses are generally more sensitive to dust, mold, weeds, and inconsistent forage quality, whereas cattle can sometimes safely consume forage that would create health risks for horses.

Alfalfa Hay

Alfalfa is a legume hay that is generally higher in protein and calories, and is a richer overall forage.

Alfalfa hay is often best for:

hard keepers
growing horses
performance horses
some senior horses

Many horse owners feed a combination of grass hay and alfalfa to balance nutrition and calorie intake.

During shortages, many owners feel pressure to purchase hay quickly, but lower-quality forage can create long-term health and feeding challenges. We discuss this more in How Hay Shortages Affect Horse Care.

What Does “First Cutting” Mean?

Hay is harvested multiple times throughout the growing season.

You may hear suppliers mention:

first cutting
second cutting
third cutting

Generally:

first cutting tends to be coarser and stemmier
later cuttings are often softer and leafier

But remember, softer hay is not automatically better.

Some horses prefer softer second-cutting hay while leaving behind coarser first-cutting stems. On the flip side, a very soft, rich hay may look beautiful to humans but can be too calorie-dense for some easy keepers.

This is one reason experienced horse owners learn how to evaluate hay based on the individual horse, not just hay appearance alone.

Watch for Dust and Mold

Dusty or moldy hay should always be taken seriously.

Dust can irritate the lungs and may contribute to chronic respiratory issues, especially in horses with asthma or airway sensitivity.

Moldy hay can be dangerous even when mold is not immediately obvious.

Signs of concern may include:

coughing during feeding
nasal discharge
increased breathing effort
refusal to eat certain flakes

If you wouldn’t be willing to eat the hay because it smells, is slimy, or otherwise off, it is best avoided giving it to your horse.

Even Great Hay Can Go Bad

As Colorado Horse Rescue’s Equine Services Director, Rachel reminds us, “Hay quality does not stop mattering once the bale gets home.”

Improper storage can quickly lead to mold growth, nutrient loss, and excessive waste. Also consider using slow feeders like hay nets or properly designed hay feeders to help reduce waste while supporting more natural forage intake.

When storing hay, the best practice is to make sure hay is:

off the ground
protected from moisture
with good airflow
away from leaks or standing water

A high-quality bale stored poorly can become unusable, contributing to hay shortage stress and higher costs.

Wet Weather Can Ruin Good Hay Fast

Forecasted El Niño conditions in parts of the U.S. could bring wetter weather patterns and increased moisture risk for Colorado. For horse owners, that doesn’t just affect growing conditions. It can affect storage quality too.

Even excellent hay will deteriorate quickly if bales sit directly on dirt or concrete, tarps trap condensation and/or airflow is limited. This will cause moisture to get trapped deep inside stacked hay.

Too much water during the harvest can also create mold problems. Freshly baled hay can feel slightly warm for a short period after baling. But hay that feels hot deep inside weeks later may indicate dangerous moisture retention and mold risk.

Horse owners sometimes discover a problem only after opening a bale and finding:

heat in the center
a sour smell
white dust or webbing
dark or slimy patches

When Should You Test Hay?

Sometimes how the hay looks and smells is not the full story.

Hay testing can help you better understand what your horse is actually eating, especially when nutrition matters more closely.

A hay test may measure protein, sugar levels, moisture, and mineral balance. In Colorado and other drought-prone western states, weather swings can make hay quality inconsistent from cutting to cutting. A wet spring followed by extreme summer heat can produce hay that looks the same on the outside but varies nutritionally from bale to bale.

For many horse owners, hay testing is not something needed constantly. But during major feed changes or when managing special dietary needs, it can be a valuable tool. For more information, check out The Complete Guide to Hay for Horses.

5 Common Hay Mistakes Horse Owners Make

Buying an entire load before testing one bale
Storing hay directly on the ground
Switching hay too quickly
Assuming green hay is automatically nutritious
Waiting until winter to secure supply

Final Thoughts

Hay quality is one of those things horse owners learn slowly over time, often one questionable bale at a time.

Good hay doesn’t need to be fancy. But it does need to be safe, consistent, and right for your individual horse. Learning how to recognize quality hay is one of the most valuable skills a horse owner can develop, especially during years when weather, drought, and supply challenges make every bale count.

If you want to learn more, explore our related guides:

Presented in partnership with HayBuy. HayBuy is a sponsor and partner of Colorado Horse Rescue.

How to Choose High-Quality Hay

for Your Horse