Horses with heaves (RAO — Recurrent Airway Obstruction) have damaged airways that react to dust, mold spores, and fungal fragments in hay. Switching to dust-free hay pellets can dramatically improve breathing.
What is heaves?
Heaves is a chronic, lower-airway disease of horses — similar to human asthma. Exposure to hay dust causes airway inflammation, mucus buildup, and labored breathing. Most cases worsen with age and traditional hay feeding.
Why hay pellets help
Hay pellets are pressed from ground hay at controlled moisture. Compared to loose hay, quality pellets have:
- 80–95% less respirable dust
- Much lower mold spore exposure
- More consistent nutritional content
- Easier soaking for dust elimination
Choosing the right pellet
For horses with heaves, prioritize:
- Timothy or orchard base — lower protein is easier for mature horses
- Lab-tested for mycotoxins — mold byproducts trigger attacks
- Low fines content — fewer dust particles in the bag
- Sealed bag packaging — prevents mold growth during storage
Our Timothy Pellets 25 lb and Barn Master 50 lb meet all these criteria. See our dust-free line for the cleanest pellets.
Soaking protocol
Even with clean pellets, soaking eliminates residual dust. Standard protocol:
- Measure portion into a bucket
- Add 2–3x volume of clean water
- Soak 15–30 minutes until pellets break down
- Feed within 2 hours — discard unused soaked pellets after 4 hours in summer
For bulk operations, our pellet rehydrator speeds this up.
How much to feed
Hay pellets can replace long-stem hay partially or fully for heaves horses. Typical ration: 1.5–2% of body weight in pellet dry matter daily. For a 1000 lb horse: 15–20 lb of pellets.
Management beyond feed
- Remove horse from barn during stall cleaning
- Dampen dusty bedding
- Provide maximum turnout — fresh air reduces exposure
- Never dry-feed hay to heaves horse — always soak or switch to soaked pellets
Watch for triggers
Even clean pellets won't help if barn air is dusty. Monitor for:
- Increased coughing at feeding
- Labored breathing at rest
- Flared nostrils at rest
- Heave line (hypertrophied abdominal muscles)
FAQ
Can a horse with heaves live on pellets alone?
Yes, many do. Long-stem hay isn't biologically required — fiber can come from pellets, beet pulp, and chaff.
How much will pellets cost vs hay?
Quality hay pellets cost roughly the same or 20% more than loose hay, but less medication and fewer vet visits offset the difference.
Is soaking really necessary?
For moderate-to-severe heaves, yes. For mild cases, dry feeding of high-quality pellets may be sufficient.