Mange in Horses

Quick Answer
  • Mange in horses is a skin disease caused by mites. The most common form is chorioptic mange, which often affects the lower legs and fetlocks, especially in draft horses with heavy feathering.
  • Common signs include itching, stamping, rubbing, hair loss, crusting, thickened skin, and irritated areas around the legs, mane, tail base, or face depending on the mite type.
  • Your vet usually confirms mange with skin scrapings and a microscope exam. Some horses also need repeat scrapings, cytology, or a skin biopsy if mites are hard to find.
  • Treatment often includes clipping long hair, topical lime sulfur or other mite-directed products, and sometimes oral ivermectin or moxidectin under your vet's guidance. Barnmates and the environment may need attention too.
  • Most horses improve well with treatment, but chronic or severe cases can take weeks to months to fully settle, especially if there is secondary skin infection.
Estimated cost: $120–$900

What Is Mange in Horses?

Mange in horses is a skin condition caused by microscopic mites. These mites live on or in the skin and trigger irritation, inflammation, and itching. Different mites prefer different body areas, so the pattern of lesions can vary from horse to horse.

The main forms described in horses are chorioptic mange (often called leg mange), psoroptic mange, sarcoptic mange, and the much less common demodectic mange. Chorioptic mange is the most common type in horses and often affects the lower limbs around the fetlock and foot. Draft horses and horses with heavy leg feathering are affected more often, but any horse can develop mange.

Many cases are uncomfortable rather than immediately life-threatening, but they still deserve veterinary attention. Ongoing itching can lead to self-trauma, thickened skin, moist dermatitis, and secondary bacterial infection. Early care usually makes treatment easier and helps reduce spread within the barn.

Symptoms of Mange in Horses

  • Itching or persistent rubbing
  • Stamping feet or rubbing one leg against the other
  • Hair loss
  • Papules or small raised bumps
  • Crusting, scaling, or dandruff-like debris
  • Thickened or folded skin
  • Moist dermatitis around the fetlocks
  • Head shaking or ear irritation
  • Weight loss, weakness, or poor appetite

Call your vet sooner rather than later if your horse is intensely itchy, developing crusts or open sores, or if multiple horses in the barn are showing similar signs. Mange is not always an emergency, but it can spread and become much harder to control once skin damage and secondary infection set in.

See your vet immediately if your horse seems painful, weak, is losing weight, has widespread skin lesions, or has signs of infection such as swelling, heat, discharge, or a foul odor.

What Causes Mange in Horses?

Mange is caused by infestation with mites. In horses, the most common mite is Chorioptes bovis, which causes chorioptic mange on the lower legs. Other mites, including Sarcoptes scabiei and Psoroptes species, can also cause mange, though some forms are less common. Demodectic mange is rare and involves mites that live in hair follicles and sebaceous glands.

Mites spread through direct contact with affected horses and, in some situations, through contaminated equipment, bedding, or the environment. Cold weather and longer winter coats can make outbreaks more noticeable. Heavy feathering on the legs can also create a favorable environment for mites and make treatment harder to apply thoroughly.

Some horses are more likely to develop persistent skin problems because of chronic irritation, crowded housing, or delayed treatment. In rare cases, demodectic mange has been reported alongside underlying health issues such as pituitary pars intermedia dysfunction or chronic corticosteroid exposure. Because several skin diseases can look similar, your vet will need to sort mange from other causes like pastern dermatitis, lice, ringworm, allergies, or bacterial skin infection.

How Is Mange in Horses Diagnosed?

Your vet usually starts with a hands-on skin exam and a close look at where the lesions are located. The pattern matters. Lower-leg itching and stamping can point toward chorioptic mange, while lesions under the mane, tail base, or on the face may suggest other mite types.

The most common test is a skin scraping. Your vet collects material from the skin and examines it under a microscope for mites, eggs, or debris. Psoroptic mites are often easier to find than sarcoptic mites, so a negative scraping does not always rule mange out. If the suspicion is still high, your vet may repeat scrapings, add skin cytology to look for infection, or recommend a skin biopsy.

Diagnosis also includes looking at the bigger picture: season, housing, bedding, whether other horses are itchy, and whether the horse has feathered legs or chronic skin disease. That full history helps your vet choose a practical treatment plan and decide whether barn-level control measures are needed.

Treatment Options for Mange in Horses

Spectrum of Care means you have options. Here are treatment tiers at different price points.

Budget-Conscious Care

$120–$300
Best for: Mild, localized cases in otherwise healthy horses, especially early chorioptic mange limited to the lower legs.
  • Physical exam or recheck-focused skin visit
  • Skin scraping and microscope evaluation when available in-house
  • Clipping feathered hair from affected areas to improve access
  • Topical mite-directed therapy such as lime sulfur spray or dip repeated as directed by your vet
  • Basic environmental cleanup of grooming tools, wraps, and shared tack
Expected outcome: Often favorable when lesions are caught early and treatment is applied consistently.
Consider: Lower upfront cost, but it may require more hands-on labor at home, repeat topical applications, and close monitoring. If barnmates are not addressed or the diagnosis is uncertain, recurrence is more likely.
Most Common

Recommended Standard Treatment

$300–$650
Best for: Most uncomplicated mange cases, recurrent leg mange, or horses with moderate itching, crusting, and skin thickening.
  • Complete physical exam
  • Skin scrapings from multiple sites and cytology if secondary infection is suspected
  • Targeted treatment plan from your vet, which may include topical lime sulfur and/or oral ivermectin or moxidectin used under veterinary guidance
  • Treatment recommendations for in-contact horses when appropriate
  • Recheck exam to confirm improvement and adjust the plan
  • Topical or systemic therapy for secondary bacterial skin infection if your vet finds evidence of infection
Expected outcome: Good in most horses, though chronic cases may need repeated treatment cycles and management changes.
Consider: More complete and practical for real-world barn control, but costs more than a minimal plan and may still require several weeks of follow-up.

Advanced / Critical Care

$650–$900
Best for: Severe, generalized, chronic, or unclear cases, horses with marked skin thickening or weight loss, and situations where first-line treatment has not worked.
  • Extended dermatology workup for severe, widespread, or treatment-resistant disease
  • Multiple skin scrapings, cytology, and skin biopsy with histopathology when mites are difficult to confirm
  • Culture or additional testing if deep infection or another skin disease is suspected
  • Sedation if needed for safe sampling or clipping
  • More intensive treatment of secondary infection, pain, or severe inflammation
  • Barn-wide management planning for outbreaks or complicated recurrent cases
Expected outcome: Still often favorable, but recovery may take weeks to months depending on skin damage and whether underlying issues are present.
Consider: Highest cost range and more diagnostics, but it can prevent repeated trial-and-error treatment and may be the most efficient path in complicated cases.

Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.

Questions to Ask Your Vet About Mange in Horses

Bring these questions to your vet appointment to get the most out of your visit.

  1. You can ask your vet which type of mange they suspect and what body pattern makes them think that.
  2. You can ask your vet whether skin scrapings are enough or if your horse may need repeat testing or a biopsy.
  3. You can ask your vet whether other horses in the barn should be examined or treated at the same time.
  4. You can ask your vet how often topical treatment should be repeated and how to apply it safely around feathered legs or sensitive skin.
  5. You can ask your vet whether clipping the hair will help treatment work better in your horse's case.
  6. You can ask your vet what signs would suggest a secondary bacterial infection or another skin problem on top of mange.
  7. You can ask your vet how to clean tack, grooming tools, wraps, and bedding to lower the chance of reinfestation.
  8. You can ask your vet when they want to recheck your horse and what improvement timeline is realistic.

How to Prevent Mange in Horses

Prevention starts with good skin surveillance. Check your horse regularly for itching, stamping, crusting, hair loss, and changes around the fetlocks, mane, tail base, and face. Early detection matters because mild cases are easier to manage than barn-wide outbreaks.

Try to reduce opportunities for mites to spread. Avoid sharing grooming tools, wraps, or tack between horses unless they are cleaned first. If one horse is diagnosed, ask your vet whether in-contact horses should be checked or treated too. Cleaning the environment, especially bedding and frequently handled equipment, can help reduce re-exposure.

For horses with heavy leg feathering, routine clipping or careful feather management may help if your vet recommends it. Keeping the skin as clean and dry as practical also supports recovery and lowers the chance that irritated skin turns into a more complicated dermatitis. Because several skin conditions look alike, the best prevention plan is one built with your vet around your horse's housing, season, and history.

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