Best Hay for Horses: Types, Quality, and How to Choose

Hay is the foundation of most horse diets, so the "best" hay depends on your horse's age, workload, body condition, dental health, and medical history. For many adult horses, a good-quality grass hay is the most practical everyday choice. Common options include timothy, orchardgrass, bermudagrass, and mixed grass hay. Legume hay such as alfalfa is usually higher in calories, protein, and calcium, which can be helpful for some horses but too rich for others.

When you evaluate hay, start with the basics. Good hay should be leafy, relatively soft, and dry, with a fresh-cut smell. It should not smell musty, sour, or moldy. Excess dust, visible mold, heavy weed content, dirt, or foreign material lowers quality and can raise health risks. More mature hay tends to be stemmier, less digestible, and lower in nutritional value than hay cut at an earlier stage.

Hay testing can be especially helpful when your horse has special needs. A forage analysis can tell you protein, fiber, mineral levels, and sometimes non-structural carbohydrates (NSC). That matters for horses with equine metabolic syndrome or laminitis risk, where many vets prefer a tested grass hay with lower NSC. If your horse is an easy keeper, overweight, or insulin dysregulated, ask your vet whether your current hay should be tested before you make changes.

One more caution: not all hay risks are obvious from appearance alone. Alfalfa hay can occasionally be associated with blister beetle contamination in some regions, and moldy hay can contribute to respiratory and digestive problems. If you are unsure about a new hay source, bring photos, the forage analysis, or even a sample to your vet or equine nutrition professional before feeding it long term.

As a general rule, horses should get at least 1% to 1.5% of their body weight per day as forage, and many do well closer to 1.5% to 2% of body weight per day on a dry-matter basis. For a 1,000-pound horse, that often works out to roughly 15 to 20 pounds of hay daily, though the right amount depends on the hay itself and on your horse's needs.

The safest way to feed hay is by weight, not by flakes. Flake size varies a lot between bale types, forage species, and how tightly the bale was packed. A bathroom scale, hanging luggage scale, or fish scale can help you weigh several flakes and learn what your horse is actually eating.

Some horses need adjustments. Easy keepers, horses with obesity, equine metabolic syndrome, or laminitis risk may need a carefully measured amount of lower-NSC grass hay. Hard keepers, growing horses, and lactating mares may need more calories and may benefit from alfalfa or a grass-legume mix. Senior horses with poor teeth may struggle with long-stem hay and sometimes do better with soaked hay cubes, chopped forage, or complete feeds.

If your horse is changing weight, leaving hay behind, quidding, coughing while eating, or acting hungry between meals, it is worth reviewing the ration with your vet. Sudden forage changes can upset the hindgut, so transition to a new hay gradually over about 7 to 10 days whenever possible.

Poor hay choice or poor hay quality can show up in several ways. Mild early signs include reduced appetite, sorting through hay, dropping partially chewed feed, mild cough during feeding, or more hay left in the stall than usual. Some horses become bloated-looking, lose weight slowly, or develop loose manure when forage quality is inconsistent.

More concerning signs include obvious dust-related coughing, nasal discharge, increased breathing effort, repeated choke episodes, colic signs, diarrhea, or sudden refusal to eat a new batch of hay. Moldy or contaminated hay can irritate the airways and digestive tract. Very stemmy hay may be hard for seniors or horses with dental disease to chew well.

There are also situation-specific red flags. Horses prone to laminitis may worsen on hay that is too high in NSC. Horses fed alfalfa from uncertain sources in blister beetle regions need extra caution. If you ever notice mouth irritation, severe depression, sweating, colic, frequent urination, or signs of toxicity after a new hay delivery, stop feeding that hay and call your vet right away.

See your vet immediately if your horse has trouble breathing, repeated colic signs, choke, marked lethargy, or sudden neurologic or toxic signs after eating hay. Even when the problem seems mild, keeping a sample from the suspect bale can help your vet decide whether testing is needed.

If your horse cannot do well on standard baled hay, there are several forage options to discuss with your vet. Tested grass hay is often the first alternative when you need more control over sugar and starch intake. Mixed grass hay can also work well for many adult horses when it is clean, consistent, and appropriately mature.

For horses with poor teeth, chronic quidding, or trouble chewing long stems, soaked hay cubes, hay pellets, chopped forage, or complete senior feeds may be easier to manage. These products can be useful, but they still need to match your horse's calorie needs and medical history. Cubes and pellets should usually be introduced gradually, and many horses benefit from soaking them to lower choke risk.

If your horse needs more calories without a large grain increase, your vet may suggest adding some alfalfa hay or an alfalfa-grass blend. On the other hand, if your horse is an easy keeper or has metabolic concerns, your vet may recommend a lower-NSC grass hay, slower feeding methods, and a ration balancer instead of richer forage.

When hay quality is unreliable in your area, a forage analysis and a consistent supplier can make a big difference. Bagged chopped hay, cubes, and pellets often cost more per pound than baled hay, but they can offer convenience and more uniformity. In 2025-2026 U.S. retail listings, many hay cubes or pellets run about $20 to $24 per 40-50 lb bag, so they are usually best used strategically rather than as the only forage source unless your vet recommends it.