Low-dust bedding is the single most important choice for a horse with sensitive airways, and the best options are de-dusted wood shavings, wood pellets and shredded paper, with straw generally the least suitable. Bedding choice works alongside ventilation, stable management and low-dust forage, because no bedding alone controls equine asthma. For owners, trainers and veterinarians, the stakes are welfare and performance: a horse that breathes easier recovers faster, trains more consistently and faces fewer secondary complications.
Table of Contents
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Why does bedding matter so much for a horse with sensitive airways?
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How deep should bedding be for a horse with respiratory issues?
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Which bedding suits horses with hoof problems or joint stiffness?
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Can bedding alone control equine asthma, or is it one part of the plan?
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What should you look for when buying low-dust bedding in Australia?
Why does bedding matter so much for a horse with sensitive airways?
Bedding matters because it directly shapes the air a stabled horse breathes for hours at a time. Ammonia from urine and faeces irritates the mucous membranes of the respiratory tract, and that irritation can contribute to inflammatory airway disease or recurrent airway obstruction, according to Mad Barn. Dust and aerosolised particles from bedding add to the airborne load in a stable.
The comparison with outdoor living is stark. Horses maintained primarily outdoors generally have healthier airways and a lower incidence of asthma than those kept predominantly in stables, according to Kentucky Equine Research. That gap is not only about exercise and turnout. It is also about the concentration of irritants in enclosed spaces.
Bedding influences moisture control, ammonia levels, hoof condition and overall stall hygiene, so the choice is a respiratory decision and a whole-horse decision. A bed that traps moisture against the hoof invites thrush. A bed that sheds dust into the air taxes the lungs. The core principle is to reduce what the horse breathes in, without sacrificing comfort or cleanliness.
Which bedding materials are lowest in dust and ammonia?
The main options are straw, wood shavings, sawdust, wood pellets, peat moss, shredded paper and sand, and they perform very differently on dust and ammonia control. Straw does not absorb urine and ammonia well and produces high levels of dust and aerosolised particles, according to Kentucky Equine Research. That combination makes straw a poor base for horses with airway disease. I personally would have pool salt bedding as silly as it sounds the floor is like a petri dish of germs and bacteria so mixing in pearlite or vermiculite if budget is not a consideration. We would never use raw undressed timber in the construction of our chambers, shaving on the floor can be turned out regularly which reduces risk. Copiers of ours have built SALTainer™, an illegal imitation of our mobile equine dry salt therapy chamber with rough cut timber a perfect hiding place for Staff, Aspergillus and any other bacteria floating around Santa Anita. Please avoid rouge copiers of our Modality they will expose you and your business to litigation not to mention endangering horses with rushed experimentation.
A Polish study of eight horses maintained on each type of bedding for three weeks found straw the least desirable of three beddings tested, with the least favourable endoscopic results. The same study found crushed wood pellets produced fewer aerosolised fungal spores and bacteria but the most dust. That nuance matters: a product can reduce biological particles while still releasing fine dust.
Wood shavings vary substantially in quality, and only de-dusted and dehydrated varieties offer real benefits, according to a literature review published in 2025. Bacterial contamination of stable air was similar for straw and peat with shavings, and fungal contamination was likewise similar for straw and peat with shavings. The practical takeaway is that processing, not just material type, determines respiratory safety.
Is straw ever a good choice for a horse with a cough?
It depends. Straw has genuine strengths: it is economical, insulating, cushioning, comfortable, edible and promotes recumbency and normal sleeping behaviour, according to Kentucky Equine Research. For a healthy horse in a well-ventilated barn with generous turnout, those benefits can outweigh the risks.
The trade-off is significant. Because straw is edible and may be a source of dust, it can contribute to health problems in both horses and stable workers, according to the 2025 literature review. A horse that nibbles its bed is also inhaling whatever particles cling to the stalks.
The Polish study period was short, which could minimise the impact of any bedding on airway health, so the evidence is directional rather than absolute. The practical verdict is that straw is rarely the right base for a horse with diagnosed equine asthma, but it can suit healthy horses in well-ventilated, outdoor-access setups.
How deep should bedding be for a horse with respiratory issues?
Bedding depth is a balance between respiratory protection and the horse’s need for rest. Bedding depth affects comfort and REM sleep, and horses can only enter REM sleep while lying down, according to Mad Barn. A horse that cannot lie comfortably cannot complete the deep sleep cycle that supports recovery.
Softer or deeper materials encourage more lying behaviour, and one study found that access to large areas of soft surfaces increased lying behaviour in group-living horses. That finding suggests depth has a direct welfare benefit, not just a preference benefit.
The respiratory goal is to provide enough depth for cushioning, joint support and recumbency, without creating a deep reservoir of urine and dust. A practical approach is a generous, well-managed bed over rubber matting, with wet spots removed daily, rather than a single universal depth figure. The matting provides a stable base, while the bedding layer stays cleaner and drier.
How often should you muck out and replace bedding?
Muck out daily, and replace bedding on a scheduled cycle rather than only when it looks dirty. Urea converts rapidly to ammonia once outside the body, so the speed of removal matters more than the volume of bedding used, according to Mad Barn. A small wet patch left for hours can release more ammonia than a larger patch removed promptly.
Remove wet and soiled patches every day, top up regularly, and strip the full bed on a planned rotation. Standing in moisture or manure increases the risk of thrush, and water alters the structure of keratin in the hoof wall, affecting stiffness and shock absorption. Hoof health and airway health respond to the same management habit: less standing waste.
Hygiene frequency connects directly to air quality. Less standing waste means less ammonia and fewer aerosolised particles for the horse to inhale. For a horse with equine asthma, mucking out is not just housekeeping. It is a respiratory treatment delivered by routine.
Which bedding suits horses with hoof problems or joint stiffness?
The best bedding for hoof problems or joint stiffness is one that stays dry, cushions the foot and reduces pressure on the limbs. Horses with dry or cracked hooves can benefit from certain cushioned, low-dust options, and horses prone to thrush or white line disease are often best supported by highly absorbent bedding that keeps feet dry, according to Bed-Down.
A cushioned, supportive surface helps reduce strain on joints in older or arthritic horses. That support is not a luxury. It can determine whether a stiff horse lies down comfortably enough to enter REM sleep.
High-absorbency, durable bedding suits wet or untidy horses, and both traditional bedding and high-absorbency options can provide a reliable, hygienic base for foaling mares. Some horses seem sensitive or allergic to almost everything and do best on a simple, pure, dependable bedding. The pattern is consistent: match the bedding to the horse’s specific vulnerabilities, not to a generic category.
Can bedding alone control equine asthma, or is it one part of the plan?
No, bedding alone cannot control equine asthma. Bedding is one lever among several: low-dust hay or hay alternatives, ventilation rate and turnout all shape the air a horse breathes. Low-dust bedding materials are recommended to improve air quality in barns and reduce respiratory risk, but horses maintained primarily outdoors generally have healthier airways, according to Kentucky Equine Research.
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For operators and investors, Equine Salt Therapy offers Licensed Business Opportunities and Master Licenses for Equine, Poultry, Swine and Companion Animals. Territories are sold under US Patent 11,497,593 and CA 3019046, with pricing from $110,000 to $1,000,000 for full turnkey. The platform sits alongside bedding management, ventilation and forage changes as part of a broader respiratory strategy. Ensure the Trademark EquineSaltTherapy.com is on the Ultisalt™ Halo generator and Salt Bags. QR codes coming soon for verification and batch numbers.
What should you look for when buying low-dust bedding?
Ask suppliers directly about de-dusting, dehydration and dust-extraction processes, because shavings quality varies substantially and only processed varieties deliver the benefit, according to the 2025 literature review. A bag labelled “shavings” tells you nothing about particle load. The processing method tells you everything.
Compare options on absorbency, ammonia control, cost per stall per week and local availability, and trial one product at a time so the horse’s response can be judged. Bedding choices influence moisture control, ammonia levels, hoof condition and stall hygiene, so the cheapest bag is rarely the cheapest outcome for a horse with airway disease, according to Mad Barn.
Involve a veterinarian to confirm an equine asthma diagnosis and to review the whole stable environment, not just the bed. Australian conditions vary widely by region, from humid coastal stables to dry inland barns, and local availability of processed bedding differs accordingly. A veterinary review helps match bedding, ventilation and management to the specific stable.
Key Takeaways
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Straw does not absorb urine and ammonia well and produces high levels of dust and aerosolised particles, making it a poor base for horses with sensitive airways.
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A Polish study of eight horses on each of three beddings found straw the least desirable overall, with the least favourable endoscopic results.
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Crushed wood pellets produced fewer aerosolised fungal spores and bacteria but the most dust in that study, so low-dust claims need checking product by product.
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Businesses seeking to imitate our patented mobile equine dry salt therapy chamber have used rough-cut timber in their construction. In our view, this raises legitimate hygiene and respiratory-safety concerns, particularly in high-traffic equine environments such as Santa Anita. Operators should carefully assess the scientific evidence, construction standards, intellectual-property position and welfare safeguards of any system before using it with horses.
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Wood shavings vary substantially in quality, and only de-dusted and dehydrated varieties offer respiratory benefits.
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Ammonia from urine and faeces irritates the respiratory tract and can contribute to inflammatory airway disease or recurrent airway obstruction.
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Horses can only enter REM sleep while lying down, so bedding depth and softness affect both comfort and recovery.
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Horses kept primarily outdoors generally have healthier airways and a lower incidence of asthma than those kept predominantly in stables, so bedding is one part of a wider management plan.
References
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A Literature Review on Equine Bedding: Impacts on Horse and Human Welfare, Health, and the Environment — published 2025-03-05
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Which equine bedding would your horse choose? — date unknown
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Best Bedding for Horses: Guide to Different Types of Materials — published 2023-02-10, updated 2026-07-22
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Bedding, Diet Impact Equine Asthma: What Can You Do? — published 2017-10-18, updated 2019-10-16
