10 min read Last updated: January 2026 Does your horse cough on the first forkful and is ammonia the first thing you smell at the door? Youll learn why daily mucking with low-dust bedding and longer turnout beats deep litter, plus the simple formula: remove droppings daily, top up lightly, and fully replace the bed every 2 weeks for calmer, healthier airways. Quick Summary Short on time? Here are the key takeaways. Area: Daily muckout What To Do: Remove droppings and obvious wet patches every day with the horse out; add a small topup; strip and disinfect the bed fortnightly. Why It Matters: Lowers dust, spores and ammonia linked to coughs and RAO risk. Common Mistake: Relying on deep litter or only skipping out for allergic horses. Area: Lowdust bedding What To Do: Use paper, wood pellets or shredded wood fibre; avoid straw for respiratorysensitive horses. Why It Matters: Minimises particles and moulds that inflame airways. Common Mistake: Choosing straw or dusty shavings because they look cosy. Area: Maximise turnout What To Do: Give long daily turnout yearround; use suitable rugs to keep the routine through wet or cold spells. Why It Matters: Outdoor air rapidly dilutes dust and ammonia. Common Mistake: Cutting turnout short due to weather or lack of the right rug. Area: Ventilation checks What To Do: Keep high vents and top doors open, clear cobwebs, and store hay/bedding away from stables. Why It Matters: Continuous airflow disperses irritants before horses inhale them. Common Mistake: Shutting up stables at night and blocking vents to keep warmth in. Area: Ammonia control What To Do: Lift wet patches promptly, increase pickouts in warm weather, and act immediately if you can smell ammonia. Why It Matters: Ammonia irritates the airway and magnifies dust effects. Common Mistake: Letting wet spots cook under a deeplitter crust. Area: Seasonal tweaks What To Do: In winter, prioritise keeping beds dry and mouldfree; in warmer months, step up wet patch removal and airflow. Why It Matters: Humidity drives mould in winter; heat raises ammonia in summer. Common Mistake: Using the same routine yearround despite changing risks. Area: Dustsmart routine What To Do: Take the horse out to muck out, open doors and vents while working, and sweep only when the horse is outside. Why It Matters: Prevents the horse breathing the dust cloud created by cleaning. Common Mistake: Mucking and sweeping with the horse standing in the stable. Area: Forage & storage What To Do: Feed lowdust forage and keep all forage and bedding dry and stored away from the stable. Why It Matters: Forage and storage areas can seed spores and dust into the breathing zone. Common Mistake: Feeding dry, dusty hay in the box and stacking bales beside stables. In This Guide Deep litter vs daily muck-out: which is better for allergic horses? What bedding should you choose for a coughy horse? How often should you muck out to balance dust and ammonia? Ventilation and turnout: the non-negotiables A simple stable routine for respiratory-sensitive horses Seasonal tweaks for UK yards When deep litter can still workand when to avoid it Warning signs your management isnt working Your horse coughs on the first forkful and you can smell ammonia before you see it classic signs your stable routine needs a rethink. If your horse is allergy-prone, the choice between deep litter and daily mucking isnt just about yard labour; its about lung health.Key takeaway: For horses with respiratory allergies, daily mucking out with lowdust bedding and extended turnout is safer than deep litter. Remove faeces daily, add a little clean bedding, and fully replace the bed about every two weeks for the best balance of dust and ammonia.Deep litter vs daily muck-out: which is better for allergic horses?Daily mucking out is better for allergic horses than deep litter, because it keeps airborne particles and mould spores lower inside the stable. German veterinary research (2009) found that beds that were tidied only by skipping out produced more fine particles than beds that were fully mucked and replenished daily and it highlighted that mould spores are the key allergen to avoid. This work was summarised by Horse & Hound and reinforced by Cambridge University specialist Colin Roberts.Crucially, confined air is the problem: in stables, relatively low levels of dust, spores and ammonia can inflame airways and trigger allergies, progressing in severe cases to incurable RAO (recurrent airway obstruction). Outdoors, dust disperses quickly and horses can move to clean air, so building more turnout into your plan is one of the most powerful changes you can make. For that reason, deep litter which relies on leaving soiled patches in place is rarely the right choice for a coughy horse.At Just Horse Riders, we recommend maximising turnout alongside a consistent, dustaware stable routine. For more comfortable outdoor time in wet UK weather, explore our winter and spring turnout rugs for reliable protection.What bedding should you choose for a coughy horse?Choose a genuinely lowdust bedding such as paper, wood pellets or shredded wood fibre, and avoid straw for respiratorysensitive horses. The British Horse Society cautions that straw may not suit horses (or carers) prone to respiratory issues, and it also tempts some horses to eat their beds; see the BHSs guidance on bedding types here.The 2009 German trial, reported by Horse & Hound, found that hemp/flax produced the most particles, followed by wood shavings; straw produced fewer particles in that study because it was fully mucked and replaced daily but straw yielded more moulds than other beds, which is a red flag for allergic horses. Paper bedding is highly absorbent (around three times more than wood shavings in tests) and has been shown to lessen respiratory inflammation, making it a solid choice for sensitive types. Shredded wood fibre, highlighted by the BHS, is both low dust and stable underfoot, which can reduce slips when getting up and down.From the respiratory point of view, the best bedding is no bedding Even healthy horses are better off on dustfree management. Colin Roberts, ILPHfunded equine internal medicine specialist, Cambridge University Veterinary School (Horse & Hound)While few of us can stable on bare floors, you can stack the odds in your horses favour: keep bedding to a functional 68 inches for comfort and insulation, pick a lowdust material, and manage it diligently every day. Complement this with lowdust forage; Your Horse has a useful overview of why dust and spores are the prime culprits behind UK horses respiratory disease burden here.Quick tip: Bring the horse out of the stable before you start mucking out to keep them out of any dust cloud, and only sweep once theyre back outside.How often should you muck out to balance dust and ammonia?Remove faeces daily, top up with a small amount of clean bedding, and fully replace the bed about every two weeks; this regimen produced the lowest gas (ammonia) levels in research. An honours study from the University of New Hampshire reported that full removal and replacement every day produced the highest gas production, while the daily pickout with minimal topup and a complete change fortnightly gave the best ammonia profile; ammonia also rises as air temperature increases (source).Why does this matter? Ammonia irritates the airway lining and magnifies the effect of dust and spores, worsening coughs and mucus. In warm spells, plan to increase muckout frequency and ventilation, and never leave wet patches to cook under a deep litter crust. In cold, damp UK winters (OctoberMarch), prioritise mould control by keeping beds dry, removing any damp edges, and storing bedding away from condensation.Pro tip: If you can smell ammonia, your horse has already been breathing it at a higher concentration for hours. Adjust the routine immediately and check airflow.Ventilation and turnout: the non-negotiablesGood ventilation and extended daily turnout are as critical as bedding choice for keeping respirable particles low. The UNH review notes three proven management pillars: clean, lowdust bedding and hay, long turnout periods, and adequate stable ventilation (source).Outdoors, airborne dust dilutes rapidly and horses can move to clean air; inside, even relatively low amounts of dust, mould and ammonia can cause measurable airway inflammation. In fact, researchers found no horse allergen in settled dust samples taken more than 100 metres from the stable, underlining how swiftly particles disperse in open air a strong argument for maximising field time whenever ground conditions allow. When your horse is turning out daily, a reliable rug helps you keep this routine, even through showers and cold snaps. Explore trusted brands like WeatherBeeta turnout and stable solutions to support a turnoutfirst plan across UK seasons.Practical ventilation checks:Air inlets and outlets: Ensure highlevel vents arent blocked; you should feel a gentle movement of air without draughts at horse level.Visual cues: Cobwebs and hanging dust signal poor airflow; clean them and reassess.Neighbour factors: Store hay and bedding separately from stables to avoid adding spores into the breathing zone.A simple stable routine for respiratory-sensitive horsesA consistent, turnoutled schedule with lowdust forage and bedding reduces daily particle exposure and supports calmer airways. Heres a practical template you can adapt to your yard:Morning: Turn out first, then muck out with the horse outside. Remove all droppings and any obviously wet patches; add a small topup of fresh, lowdust bedding. Open doors and vents while you work.Midday: Check water and damp spots; if temperatures climb, lift any wet areas to reduce ammonia.Evening: Bring in onto a tidy, settled bed, ideally after dust has had time to settle. Feed lowdust forage. Keep the stable ventilated overnight (windows or top doors open where safe).Fortnightly: Strip the bed fully, disinfect the floor, allow it to dry, then relay fresh bedding.Supportive extras make the routine easier and healthier. For more field time without fuss, see our range of fly rugs and sheets for spring/summer comfort and stable rugs for cosy, wellventilated nights. If your horse needs ongoing respiratory support, browse targeted options in our supplements collection popular choices include formulations from NAF. Daily grooming also helps you spot early signs of irritation and remove settled dust from the coat; youll find timesaving kits in our grooming range.Seasonal tweaks for UK yardsIn UK winters (OctoberMarch), focus on mould control; in spring and summer, manage rising ammonia with more frequent pickouts and airflow. Damp, chilly months raise humidity in stables, encouraging mould growth in bedding and forage; keep storage dry, beds wellmaintained, and ventilation constant. As temperatures climb, ammonia levels increase, so lift wet patches promptly and keep air moving.Seasonal kit helps you maintain turnout despite the weather. For wet and changeable months, pick durable, breathable turnout rugs; in the height of summer, use lightweight fly rugs and sheets to deter insects without trapping heat. On colder nights in the box, opt for breathable stable rugs rather than heavier bedding the goal is warmth without adding dust.Quick tip: Shorter daylight in winter means more road hacking to and from fields; keep yourself seen with our highvisibility rider gear in the hivis collection.When deep litter can still workand when to avoid itDeep litter may be acceptable for nonallergic horses in wellventilated stables, but its unsuitable for any horse (or carer) with respiratory sensitivities. The problem isnt only the top layer; its the buildup beneath, where damp organic matter fuels mould growth and ammonia release, especially in warm weather. Disturbing a longstanding bed can also release a burst of fine particles precisely what a coughy horse doesnt need.If your horse has a history of coughing, nasal discharge, heaves, or you notice a strong ammonia smell, switch to daily pickout with lowdust bedding straight away and prioritise turnout. For healthy horses managed on deep litter for yard reasons, commit to excellent ventilation and be prepared to fully remove and reset the bed at least every couple of weeks if respiratory signs appear.Warning signs your management isnt workingEarly, mild airway irritation often shows as occasional coughing particularly when you start mucking out and small amounts of mucus. Left unaddressed, signs can progress to more persistent coughing, visible nasal discharge, flared nostrils, heaving flanks and exercise intolerance. If you can smell ammonia on entering the stable, see dusty surfaces or watch particles dancing in torchlight, your air quality needs attention.Act fast: step up turnout, switch to the lowestdust bedding you can source, improve ventilation, and review forage quality. Consult your vet if signs persist chronic disease like RAO requires medical management as well as environmental change.FAQsWill daily mucking out eliminate respiratory problems in my horse?Daily mucking out significantly reduces airborne particles and is safer than deep litter, but it wont eliminate risk on its own. Combine it with lowdust bedding and forage, strong ventilation, and long turnout periods. As Cambridge specialist Colin Roberts puts it, the best bedding is no bedding, underscoring the value of time outside (Horse & Hound).Is straw suitable for horses with allergies?No straw isnt recommended for respiratorysensitive horses. It tends to carry more moulds and can be dusty; the BHS specifically flags straw as unsuitable for horses or carers with respiratory disorders (BHS). Choose paper, wood pellets or shredded wood fibre instead.Does deep litter produce more ammonia?Ammonia buildup is influenced by how you muck out rather than the material alone. Research noted the highest gas production when bedding was fully removed and replaced daily, and the lowest when faeces were removed daily with a small topup and the bed stripped every two weeks (UNH review). For allergic horses, that daily pickout regimen with lowdust bedding is the best compromise.How much does bedding type matter compared to mucking routine?Both matter and they work best together. The German study attributed better air quality on straw to the fact it was fully mucked and replenished daily, not to straw itself. Lowdust materials amplify the benefits of a good routine; dusty materials undermine it (Horse & Hound).What are the early signs my horse is affected by stable dust?Look for coughing during mucking out, mild nasal discharge, increased mucus, and effortful breathing at rest or during work. In more serious cases (RAO), symptoms escalate to frequent coughing, heavy breathing and exercise intolerance. If you see these signs, act on ventilation, bedding and turnout immediately and contact your vet.Is ventilation as important as bedding choice?Yes ventilation and turnout are as important as bedding for air quality. Evidencebased practices include clean, lowdust bedding and hay, long periods outside, and ensuring stables are well ventilated to disperse dust and ammonia (UNH review).What practical products help me keep the dust down?Prioritise lowdust bedding and forage, then make turnout easy yearround with durable turnout rugs and summerweight fly rugs. Consider targeted respiratory supplements (including options from NAF) and keep on top of coat hygiene with tools from our grooming collection. For cosy nights without overbedding, explore breathable stable rugs.At Just Horse Riders, were here to help you set up a lowdust routine that keeps your horse comfortable through every UK season. If youd like personalised suggestions for rugs or supportive supplements, get in touch or browse our curated collections to get started today. Shop the Essentials Everything mentioned in this guide, ready to browse. Shop Turnout RugsShop Fly RugsShop Stable RugsShop SupplementsShop WeatherBeeta