Horse Allergy Test: Everything You Need to Know

Allergies can cause a range of symptoms in horses, from hives and itchiness to coughing and respiratory issues. Identifying the specific allergens that trigger these reactions can be a challenge, but a horse allergy test can help. 

One of the most common types of horse allergy tests is skin testing. This involves injecting a small amount of the allergen into the horse’s skin. The horse is then monitored for signs of an allergic reaction, such as redness, swelling, or itching at the site of the injection.

Another type of horse allergy test is the blood test. This involves drawing a sample of the horse’s blood and analyzing it for the presence of specific antibodies that indicate an allergic reaction. While this test is less immediate than the skin prick test, it can provide valuable information about the horse’s overall immune response to allergens.

[To learn more about allergies in horses, check out our blog post >> Allergies in Horses: Causes, Symptoms, and Treatment]

How Do You Diagnose Allergies in Horses?

When a horse owner suspects their horse may have an allergy, a veterinarian will perform diagnostic procedures to identify the allergen. There are two primary types of allergy testing: skin testing and blood testing.

Consultation with a Veterinarian

Before any diagnostic testing is performed, a consultation with a veterinarian is recommended. The veterinarian will examine the horse and take a detailed medical history. They will ask questions about the horse’s environment, such as the type of bedding and feed used, as well as any recent changes in the horse’s routine. The veterinarian will also look for any lesions on the horse’s skin that could be related to an allergic reaction.

Skin Testing

Skin testing is the most common method of allergy testing in horses. The intradermal skin test involves injecting a small amount of allergen into the skin and monitoring the reaction. The veterinarian will shave a small area of the horse’s skin and inject a small amount of the allergen. The area is then monitored for swelling or redness, which indicates an allergic reaction.

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Skin biopsies may also be taken to confirm the diagnosis. The veterinarian will take a small sample of skin from the affected area and examine it under a microscope for signs of inflammation.

Blood Testing

Blood testing is another method of allergy diagnostics in horses. A blood sample is taken from the horse and sent to a laboratory for analysis. The laboratory will test the sample for antibodies to specific allergens. This type of testing is less invasive than skin testing, but it may not be as accurate.

Diagnostic tests for horse allergies can be time-consuming and expensive. However, once the allergen is identified, the veterinarian can work with the owner to develop a treatment plan that may include changes to the horse’s environment or medication to manage the allergic reaction.

Treatment and Management

Medications and Vaccines

Once a horse allergy has been diagnosed, the veterinarian may prescribe medications to help manage the symptoms. Antihistamines, corticosteroids, and bronchodilators are commonly used to alleviate itching, swelling, and respiratory distress. In some cases, a veterinarian may recommend a vaccine to help desensitize the horse to specific allergens.


Allergen-specific immunotherapy is a long-term treatment option that can be effective in managing horse allergies. This treatment involves gradually introducing small amounts of the allergen to the horse’s immune system, allowing the body to build up a tolerance over time. Immunotherapy can be administered through injections or sublingual drops.

Dietary Adjustments

In some cases, dietary adjustments may be necessary to manage horse allergies. Horses with food allergies may need to be switched to a hypoallergenic diet or have certain allergens removed from their feed. It is important to work closely with a veterinarian or equine nutritionist to ensure that the horse’s nutritional needs are being met.

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Environmental Control

Environmental control is an important aspect of managing horse allergies. This may include measures such as keeping the horse in a clean, dust-free environment, using air filters, and avoiding exposure to specific allergens. In some cases, it may be necessary to limit the horse’s outdoor time or use a mask to prevent inhalation of allergens.

Prevention and Horse Care

Horse allergies can sometimes be prevented by taking proper care of the horse and maintaining a clean environment. Here are some tips to help prevent horse allergies:

Proper Pasture Maintenance

Proper pasture maintenance is essential to prevent horse allergies. Horse owners should ensure that the pasture is free of weeds, tall grasses, and other allergens. Regular mowing and weed control can help reduce the risk of allergies. Additionally, it is important to ensure that the pasture is well-drained to prevent the growth of molds and bacteria.

Use of Supplements

Supplements can help boost the immune system of horses and reduce the risk of allergies. Omega-3 fatty acids, probiotics, and other supplements can help reduce inflammation and improve overall health. However, horse owners should consult with a veterinarian before giving their horse any supplements to ensure that they are safe and effective.

Regular Check-ups

Regular check-ups with a veterinarian can help detect and treat allergies early on. A veterinarian can perform allergy tests to identify the specific allergens that are causing the horse’s symptoms. Additionally, regular check-ups can help ensure that the horse is in good health and receiving proper care.

By following these tips and taking proper care of their horses, horse owners can help prevent allergies and ensure the health and well-being of their animals.

Frequently Asked Questions

What is the cost of Nextmune allergy testing for horses?

The cost of Nextmune allergy testing for horses varies depending on the type of testing required and the veterinary clinic providing the service. Generally, the cost ranges from $200 to $500.

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Can allergy shots be used to treat horse allergies?

Yes, allergy shots can be used to treat horse allergies. Allergy shots, also known as immunotherapy, work by exposing the horse to small amounts of the allergen over time, gradually building up the horse’s immunity to the allergen. This can reduce or eliminate the horse’s allergic reaction to horses.

What is horse serum allergy and how is it diagnosed?

Horse serum allergy is an allergic reaction to horse serum, which is a component of some vaccines and medications. The allergy can cause symptoms such as hives, difficulty breathing, and anaphylaxis. Diagnosis is typically done through skin testing or blood testing.

What is equine intradermal allergy testing and how does it work?

Equine intradermal allergy testing is a diagnostic test used to identify the specific allergens that a horse is allergic to. The test involves injecting small amounts of allergens under the horse’s skin and observing the skin’s reaction. The test is typically done on the horse’s neck or shoulder.

How accurate is allergy testing for horses?

Allergy testing for horses is generally considered to be a reliable diagnostic tool. However, it is important to note that false positives and false negatives can occur, and that the results of the test should be interpreted in conjunction with the horse’s clinical signs and history.

What are the symptoms of horse allergies?

The symptoms of horse allergies can vary from mild to severe and can include hives, itching, coughing, wheezing, nasal discharge, and difficulty breathing. In severe cases, anaphylaxis can occur, which is a life-threatening allergic reaction.

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