What is thrush in horses?
Who hasn't experienced this? The snow has melted, the horses are finally back out in the paddock after a long season in their stalls – and the ground is softened by the thaw. Or they're already standing in the muddy spring paddock, where the wetness and mud put a lot of strain on their hooves. It's precisely in situations like these that you often hear: "My horse mustn't stand in the mud, otherwise it will get thrush."
The risk is also high in autumn : With shorter days and frequent rain showers, pastures quickly turn into damp, muddy areas. Leaves, manure, and persistent wetness create an ideal environment for bacteria to multiply and attack the frog of the hoof. It's no wonder, then, that thrush is one of the most common hoof diseases in horses .
👉 Challenges for horses in autumn
👉 Challenges for horses in spring
Whether in spring or autumn – wherever moisture and poor stable hygiene coincide, the risk of thrush increases. Therefore, it is important to know the causes, symptoms, and treatment options and to take preventative measures in time to keep your horse's hooves healthy.
In a cross-sectional study of 942 horses in the Netherlands , 85% suffered from at least one hoof disease. Thrush was the most frequently diagnosed condition , affecting 45% of the horses examined.
(Holzhauer et al., 2017, Preventive Veterinary Medicine, DOI: 10.1016/j.prevetmed.2017.02.013
Litzke's definition of thrush:
" Thrush is the decomposition and gradual transformation of the frog horn into a greasy, foul-smelling, discolored mass caused by putrefactive agents."
(Definition from "The Hoof" by F.-L. Litzke)
Symptoms – how to recognize thrush
Thrush is recognizable by deep sulci in the frog and the foul odor released when the hoof is picked. It is caused by putrefactive bacteria that are ubiquitous in the soil and penetrate small injuries to the frog horn.
When deprived of air, they lead to the decomposition of the frog and, in the worst case, to inflammation of the bulbs and the sensitive laminae of the hoof. Many horses seem to be affected, especially in spring.
- Typical foul odor from the hoof
- Black, eroded horn in the frog grooves
- Pain sensitivity when scraping
- In severe cases: lameness
What is the main cause of thrush?
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In our opinion, a weakened immune system and a suboptimal metabolism must be seen as the main cause.
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Consequently, several factors that come together in winter promote thrush: With little movement and long periods of standing around in the stall, self-cleaning is limited due to the barely functioning hoof mechanism.
- Furthermore, ammonia from urine accumulates in wet bedding and on damp ground in the paddock. This acts as an alkaline solution, attacking the frog and providing additional space for bacteria. If the horse's hooves then become filled with dirt, air can no longer reach the frog, creating the ideal environment for putrefactive bacteria to decompose it.
There are many different remedies on the market, some based on strong chemical products, that are supposed to combat thrush.
How can we prevent thrush?
It is worthwhile to pay attention to certain everyday aspects of posture:
- Dry, ammonia-free stables,
- mucked-out paddocks and
- Daily hoof care is essential to prevent thrush.
- If thrush does occur, it is recommended that the farrier/hoof trimmer thoroughly cut away all rotten areas on the frog.
- Rinsing with water daily does not harm the hoof. It washes away the bacteria that cause rot and the ammonia.
- Afterwards, the hooves should be thoroughly dried and not greased, otherwise the oxygen will not penetrate to the deepest parts.
- Of course, the horses should go out to the paddock daily despite the mud. But perhaps the groom or a fellow stable hand could quickly scrape their hooves if you can't do it yourself.
In the video, farrier Armin Eberle treats a hoof with thrush. After trimming the affected area cleanly, he uses STEINKRAFT zeolite hoof powder .
"The effectiveness of the hoof powder is further enhanced by supplementing with zeolite. I often find that many horse owners are unaware that you can tell from the hooves if something is wrong with the acid-base balance. And I recommend zeolite as bedding as a preventative measure anyway."
Recommendation from hoof expert Martina Wimmer from Kitzbühel 💛
Home remedies for treating thrush: Overview
There are numerous home remedies that can be used to treat thrush. The following overview shows their effects, applications, and benefits at a glance. For those seeking a quick overview, the information is presented in a table. We then describe the home remedies in more detail.
| Home remedies | Effect | Application | Special advantage |
|---|---|---|---|
| Vinegar solution | Antibacterial, disinfectant | Dilute 1:1 with water, apply daily to affected areas. | Regulates the environment in the hoof |
| saline solution | Antibacterial, drying | 1 tablespoon of salt in 1 liter of warm water, rinse the hoof. | Simple & cost-effective |
| Tea tree oil | Antiseptic, antibacterial, fungicidal | Apply a few drops (diluted) with a cotton pad. | Particularly effective in combination with zeolite |
| Betaisodona / Iodine | Strongly disinfecting, drying | Apply sparingly, only in consultation with a veterinarian | Effective in cases of severe infection. |
| sugar-iodine paste | Sugar dehydrates bacteria, iodine disinfects. | 3 parts sugar + 1 part iodine, apply 1-2 times daily. | Effectively draws rot out of the stream |
| coconut oil | Antibacterial, protective, nourishing | Apply a thin layer to the cleaned hoof area. | Keeps the stream smooth |
| garlic paste | Antibacterial, antiviral, fungicidal | Crush fresh garlic, apply, and wash off after a few minutes. | Natural “all-purpose weapon” |
| Zinc oxide ointment | Disinfectant, promotes healing | Apply directly to affected areas. | Does it protect horn from external influences? |
| toothpaste | Antibacterial, slightly drying, cleansing | Apply a thin layer, massage in, and rinse off after a few minutes. | Practical & quickly available |
| Zeolite | Highly absorbent, binds moisture and pollutants, antibacterial | Apply directly into cracks and furrows as a powder. | Natural mineral, dries and regenerates |
Now, once again in complete sentences, the effects and applications of the home remedies.
1. Vinegar solution:
- What it does: Vinegar has an antibacterial and disinfectant effect.
- Application: Mix apple cider vinegar or regular household vinegar with water in a 1:1 ratio. Clean the affected areas of the hoof daily with the solution. This helps to regulate the environment in the hoof and inhibit bacterial growth.
2. Saline solution:
- What it does: Salt has an antibacterial and drying effect.
- Application: A saline solution can easily be prepared at home by dissolving one tablespoon of salt in one liter of warm water. Rinse the hoof thoroughly and apply the solution directly to the affected areas.
3. Tea tree oil:
- What it does: Tea tree oil has strong antiseptic, antibacterial and fungicidal properties.
- Application: A few drops of tea tree oil can be carefully applied to the affected areas using a cotton pad or a clean cloth. For deeper thrush, the tea tree oil should be diluted slightly (e.g., with water or a base oil such as olive oil) to avoid irritation.
TIP: Mix a few drops of tea tree oil with fine zeolite powder. This way, you're applying two active ingredients at once. This combination has proven most effective for us.
4. Betaisodona (iodine solution):
- What it does: Betaisodona has a strong disinfectant and antiseptic effect.
- Application: Carefully apply the iodine solution to the affected areas. Since iodine also has a strong drying effect, it should be used sparingly and only after consulting a veterinarian.
5. Sugar-iodine paste:
- What it does: Sugar is hygroscopic, meaning it draws moisture away from bacteria, while iodine has a disinfectant effect.
- Application: Mix 3 parts sugar with 1 part iodine to form a paste. Apply this to the affected area to help dry out the thrush. This paste can be applied up to twice a day.
6. Coconut oil:
- What it does: Coconut oil has an antibacterial and moisturizing effect and protects the affected area from the penetration of further bacteria.
- Application: Apply a thin layer of coconut oil to the cleaned hoof area. The oil keeps the affected area supple and protects against drying out.
7. Garlic paste:
- What it does: Garlic has antibacterial, antiviral and fungicidal properties.
- Application: Crush a few garlic cloves into a paste and apply it to the affected areas. Leave the paste on for a few minutes and then thoroughly clean the hooves.
8. Zinc oxide ointment:
- What it does: Zinc has a disinfecting and healing effect.
- Application: Apply the ointment to the affected areas to promote healing and protect the horn from external influences.
9. Toothpaste:
- What it does: Toothpaste often contains antibacterial ingredients that can also help fight thrush. The paste also has a slightly abrasive effect that cleans and dries the hoof horn.
- Application: Apply a small amount of toothpaste (preferably one without additives like fluoride) to the affected areas and massage it in. Rinse thoroughly after a few minutes. Toothpaste is particularly suitable for superficial thrush and as an additional measure for hoof cleaning.
10. Zeolite:
- What it does: Zeolite is a natural volcanic mineral that, due to its high absorbency, binds excess moisture and harmful substances from the hoof. It also has antibacterial properties and promotes healing.
- Application: Zeolite powder can be sprinkled directly onto the affected areas after cleaning. It helps keep the hoof dry and supports horn regeneration. For deeper cracks and fissures, zeolite can be carefully applied to the affected areas using a cotton swab or wooden stick.
Tips for using hoof powder for thrush:
- Regular cleaning: Before using any home remedy, the hooves should be thoroughly cleaned to remove dirt and bacteria.
- Clean environment: A clean and dry environment is important to prevent bacteria from re-entering the hoof.
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Monitoring by experts: Regular check-ups by a farrier, alternative practitioner or veterinarian are necessary to monitor progress and adjust treatment if necessary.
"Before attempting to treat the hoof yourself, I always advise having the thrush examined by a veterinarian or farrier."
Focus Veterinary Magazine: Recognizing, treating and preventing thrush in horses
Hoof care tips - from hoof orthopedists:
Thrush is a disease of the hoof - caused by putrefactive bacteria.
"Thrush is caused by anaerobic bacteria (bacteria that grow without oxygen). The bacterium Fusobacterium necrophorum (a pathogen that can also cause rot and abscesses) plays a particularly crucial role."
Petrov et al., 2013, Veterinary Microbiology, DOI: 10.1016/j.vetmic.2012.07.037
To prevent thrush or during treatment, it is important to avoid all factors that promote rot.
Swiss hoof orthopedist Armin Eberle therefore recommends:
1. Keeping the horse clean is very important. The stall should be mucked out regularly. Good results can also be achieved with high-quality, dry bedding .
2. If thrush has already developed, the frog should be cleaned and zeolite hoof powder applied (possibly in combination with gauze). This should be repeated daily.
3. Sometimes horses become so acidic (e.g., due to medication) that their intestines can no longer cope. In these cases, the skin helps to eliminate toxins through the hooves. Here, the intestines can be supported in their detoxification process.
4. Any measures that strengthen the animal's immune system can help.
5. A bath can be enhanced with zeolite additives. Zeolite ointment , zeolite masks, or baths with added zeolite can also be used to treat leg swelling (the cause of which always lies within the body).
Conclusion: Treat thrush in horses promptly and, of course, prevent it.
Thrush is a widespread hoof disease that causes horses pain and, in the worst case, can lead to inflammation. Early detection of typical symptoms such as deep collateral grooves and a foul odor allows for quick countermeasures through consistent care, home remedies, and professional support.
Clean, dry living conditions and daily hoof care are particularly important. At the same time, the immune system should be strengthened and the metabolism supported to promote hoof health from within.
Zeolite has proven effective as a natural support:
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Zeolite hoof powder dries the frog, binds moisture and inhibits rot-causing pathogens.
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Zeolite bedding ensures a clean, dry environment in the stable and helps prevent thrush.
This allows horse owners to treat thrush in a gentle, sustainable way and at the same time prevent it from recurring – for permanently healthy and resilient horse hooves.
💬 Customer experiences with thrush
👉 Click here for more customer experiences and reports on the use of zeolite in horses ♡🐴♡
👉 And here you can read a testimonial from Heike Kemmer. She recommends the zeolite hoof powder – because it's natural and effective!
FAQs
❓How do I recognize thrush in a horse?
The telltale signs are the foul smell, black horn components, and painfully sensitive frog grooves.
❓What helps quickly against thrush?
Daily hoof care, clean living conditions, and natural remedies such as zeolite hoof powder with tea tree oil.
❓Can thrush be treated with home remedies without chemicals?
Yes, for example with apple cider vinegar or tea tree oil. Special hoof powders like zeolite are more effective.
❓How do you prevent thrush?
Through consistent hoof care, dry stalls with binding bedding and sufficient exercise.
Conclusion:
Thrush in horses is a widespread hoof disease that occurs primarily during damp seasons such as spring and autumn. It is usually caused by putrefactive bacteria such as Fusobacterium necrophorum (a bacterium that thrives in oxygen-poor, moist environments). The good news is that with consistent hoof care, clean and dry stabling, and targeted treatment, thrush can be effectively managed in most cases.
Natural remedies like zeolite hoof powder – where the effects of zeolite are combined with the power of tea tree oil – can be helpful, as they bind moisture, deprive bacteria of their breeding ground, and promote the healing process. It is important to recognize thrush early and consistently eliminate the causes to prevent relapses.
Therefore, the following applies: Those who know the causes, take the symptoms seriously and rely on regular care can effectively treat and prevent thrush – and enable their horse to have permanently healthy, stable hooves.
👉 Discover zeolite hoof powder in the shop now
Sources:
Ali, Q., Fatima, A., Hussain, N., Jamali, MK, Hassan, S., Aziz, A., Arkan, A., & Rashid, HB (2024). Comparative efficacy of Pythium oligandrum , thrush powder and magnesium sulphate to treat thrush in horses. Journal of Population Therapeutics and Clinical Pharmacology, 31 (5), 149–157.
Holzhauer, M., Dik, KJ, van der Hoorn, M., & van Weeren, PR (2017). Cross-sectional study of the prevalence of and risk factors for hoof disorders in horses in The Netherlands. Preventive Veterinary Medicine, 139, 99–104. https://doi.org/10.1016/j.prevetmed.2017.02.013
Petrov, KK, Baric, RS, & Vlahovic, MS (2013). Fusobacterium necrophorum , and not Dichelobacter nodosus , is associated with equine hoof thrush. Veterinary Microbiology, 162 (2-4), 914-918. https://doi.org/10.1016/j.vetmic.2012.07.037
Wilson-Welder, JH, Krull, AC, & Plummer, PJ (2024). Correlation of lesion severity with bacterial changes in hoof lesions. Animal Microbiome, 6 (1), Article 21. https://animalmicrobiome.biomedcentral.com/articles/10.1186/s42523-024-00304-9
F.-L. Litzke, The Hoof – Textbook of Horseshoeing , Edition (e.g. 6th ed.), Enke Verlag.
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