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Equine Diseases
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Learn all you need to about the most common and most unique horse diseases from around the world.

Not sure which disease your horse has, check out Happie Horse’s Symptom Checker to find out what your horse’s symptoms indicate.

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Frostbite in horses is a condition resulting from prolonged exposure to extreme cold, causing tissue damage and potential necrosis, particularly in the extremities
Temperature/Weather Related Illness

Frostbite in Horses

Frostbite Seek veterinary advice if you suspect this disease. Frostbite in horses is a serious condition that occurs when the

Mud fever, or pastern dermatitis, is a skin condition in horses marked by inflammation and scabbing on the lower limbs, often exacerbated by wet or muddy environments
Skin and Coat

Mud Fever (Pastern dermatitis)

Mud Fever (Pastern dermatitis) Seek veterinary advice before applying any treatment. Mud Fever is often caused by bacteria in wet

Lavender Foal Syndrome in horses is a genetic disorder characterized by neurological symptoms such as ataxia, seizures, and behavioral abnormalities, often resulting in early death
Congenial (Genetic)

Lavender Foal Syndrome

Lavender Foal Syndrome This disease is fatal, and cannot be cured or adequately treated and is expected to result in

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The coronary sinus in horses is a large vein that collects deoxygenated blood from the heart muscle and returns it to the right atrium.
Hoof Diseases

Coronary Sinus (Quittor) in Horses

Coronary Sinus (Quittor) Seek veterinary advice before applying any treatment. Quittor is a term used to describe chronic infection of

Fungal keratopathy in horses is a condition characterized by fungal infection of the cornea, leading to inflammation, ulceration, and potentially severe ocular discomfort
Ears and Eyes

Fungal Keratopathy in Horses

Equine Fungal Keratopathy Seek veterinary advice before applying any treatment Fungal keratitis is an infection of the clear outer surface

Allergy in horses refers to an exaggerated immune response to certain substances, leading to symptoms such as itching, hives, and respiratory distress
Immune System

Allergies in Horses

Equine Allergy Seek veterinary advice before applying any treatment An allergy is an exaggerated response from the immune system to

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Mud fever, or pastern dermatitis, is a skin condition in horses marked by inflammation and scabbing on the lower limbs, often exacerbated by wet or muddy environments

Mud Fever (Pastern dermatitis)

Mud Fever (Pastern dermatitis) Seek veterinary advice before applying any treatment. Mud Fever is often caused by bacteria in wet environments. It is a non-contagious skin disease. When the skin softens due to long exposure to wetness, in combination with mud that rubs against and damages it, bacteria can enter. This most often occurs on the lower legs, horses with feathering are more prone to it since the feathering doesn’t dry well and hold on to mud more. Another cause

equine sinusitis horse chronic acute

Acute and Chronic Equine Sinusitis

Chronic and acute Equine Sinusitis Seek veterinary advice if you suspect this disease. Sinusitis refers to inflammation or infection of one or more of the paranasal sinuses, and it is the most commonly encountered disease of the paranasal sinuses. It is classified as either primary or secondary, and acute or chronic. Primary sinusitis is defined as an infection in the sinus, usually bacterial in origin, which results in a buildup of pus within the sinus. Primary sinusitis is typically the

Entrapment Colic Gas Colic Impaction Colic Sand Colic Spasmodic Colic Strangulation Colic

Equine Colic

Equine Colic This disease is life-threatening and should be treated by a veterinarian swiftly. There are several types of Colics with different causes: Entrapment Colic – caused by colonic motility dysfunction or an accumulation of gas Gas Colic – caused when a horse ingests forage that is high in sugar, causing excessive fermentation in the gut, creating a buildup of gas Impaction Colic – caused by an obstruction in the bowel due to dry, firm feed or foreign materials Sand