Dehydration occurs when there is excessive loss of water in the horse’s body. Generally due to strenuous exercise or long bouts of diarrhea, this loss of water and electrolytes —
Heat Stroke in Horses
Hyperthermia Also known as heat exhaustion or hyperthermia, heat stroke is a condition that occurs with horses performing a great deal of work in excessively hot or humid conditions. When
Seizures in Horses
Epileptic Seizures Much like in humans, horses suffer from epilepsy. And although equine epilepsy may not be the most common of horse afflictions, it is one that horse owners should
Undescended Testicles in Horses
Cryptorchidism in Horses Cryptorchidism is the failure of one or both testes to descend into a normal scrotal position from the abdominal cavity after birth. Cryptorchidism may not be apparent
Unable to Sweat in Horses
Anhidrosis in Horses Anhidrosis is defined as the inability to sweat. This problem in horses usually develops over time but can occur acutely. Since horses depend on their ability to
Trauma, Concussion or Other Brain Injuries in Horses
Traumatic Brain Injury in Horses Brain trauma, concussions, and other brain injuries are relatively uncommon among horses and usually are a result of severe trauma such as a fall, kick
Skin Tumors (Equine Sarcoid) in Horses
Equine Sarcoid A sarcoid is a tumor found on the skin of horses, donkeys, and mules. It is one of the most common skin neoplasias seen in horses. It is
Skin Infection (Boil) in Horses
Boil A boil, the result of an infection in the skin, is similar to an abscess. It starts out as a small bump and grows over time to become a
Retained Dental Cap in Horses
Failure of Deciduous Caps to Shed in Horses From the first to fourth years of life of a horse, the permanent teeth begin to grow in, but in order for
Rat Poison (Cholecalciferol) Toxicity in Horses
Cholecalciferol Poisoning in Horses Cholicalciferol (vitamin D3) is the active ingredient in many types of rat poison. A high dose of cholicalciferol will cause a destabilization of calcium in the
Pregnancy Loss (Miscarriage) in Horses
Abortion in Mares It is not uncommon for horses to experience spontaneous abortions (miscarriages). A variety of medical reasons can cause this reaction, many of which depend on the gestational
Pink Eye in Horses
Conjunctivitis in Horses Much like humans, horses can contract conjunctivitis (inflammation of the conjunctiva which is a part of the eye), also known as pink eye. It may be due
Nose Bleed in Horses
Bleeder The word “bleeder” is used to describe a horse that bleeds from the nostrils during or after a period of hard work. This can be frightening for any horse
Nightshade Poisoning in Horses
Atropa Belladonna Intoxication in Horses There are a whole host of wild plants that have been found to be poisonous to horses. One of the more common and especially toxic
Neurological Virus in Horses
Borna Disease in Horses Borna is a viral disease that occurs in horses (and other warm-blooded animals). First discovered in horses in Germany, it is predominantly a disease found in
Muscular and Skeletal Illnesses in Horses
Equine Polysaccharide Storage Myopathy Equine Polysaccharide Storage Myopathy (EPSM) is an illness that affects the skeletal and muscular systems in many of the stockier horse breeds. Among those breeds
Muscle Tremor Disorder in Horses
Hyperkalemic Periodic Paralysis Hyperkalemic Periodic Paralysis (HYPP) is a type of muscle disorder that is normally found in the American Quarter Horse breed. Initially, the disease seems has similar symptoms
Lice Infestation in Horses
Pediculosis Infection In Horses There are two main types of lice: those that feed through biting and those that feed through sucking. Lice are small, flat-bodied insects. Fully grown, they
Lead Poisoning in Horses
Environmental Toxins Most instances of lead poisoning in horses occur when they have grazed on pastures that have been contaminated with industrial waste, which is known to contain a great
Laurel Poisoning in Horses
This Common Shrub is Highly Fatal to Horses The laurel plant is a common shrub, mainly found in the Southeastern United Sates in open wooded areas, mountainous areas, and in
Kidney Inflammation in Horses
Nephritis in Horses Nephritis, inflammation of the kidneys, is relatively rare overall in the equine population. In most cases, nephritis does not affect adult horses, as their immune systems are
Intestinal Bacterial Infections in Horses
Endotoxemia in Horses The presence of endotoxins in the blood is referred to as endotoxemia. These toxins are generally due to the presence of certain types of bacteria in the
Inner Ear Plaque in Horses
Aural Plaque in Horses Also called aural papilloma, aural plaque is a condition affecting the inside of a horse’s ear. A white, plaque-like material, it sometimes appears thick and crusty.
Hernia in Horses
Equine Hernia A hernia is one of many afflictions that can affect foals during birth. There are two types of hernia that a foal can suffer from, both of which
Hepatitis in Horses
Liver Inflammation in Horses Hepatitis is defined as inflammation of the liver. A vital organ that performs numerous metabolic functions that are necessary for life, much of the liver can
Head Shaking in Horses
Head Shaking Syndrome in Horses Severe head shaking in horses is a pathological behavior. While some head shaking is a normal behavior, such as in a tool to escape insects
Fusing Joints in Horses
Ankylosis in Horses Ankylosis is the term for when a damaged joint has become fused, usually as a result of chronic or severe joint disease. When a joint ankyloses, it
Forage Poisoning in Horses
Botulism Botulism is a serious paralytic illness caused by toxins released by the bacterium Clostridium botulinum. It is normally associated with the ingestion of spoiled vegetative matter while grazing,
Flu Virus in Horses
Equine Influenza Sometimes referred to as the horse flu, equine influenza is one of the most widespread infectious viral equine diseases in the world. In the U.S., it is most
Equine Infectious Anemia
Infection Anemia in Horses Sometimes referred to as horse malaria or swamp fever, Equine Infectious Anemia (EIA) is a virus that causes destruction of the horse’s red blood cells, causing
Equine Herpes Virus
Herpes Virus in Horses The herpes virus is a large family of viruses. Most mammalian species are susceptible to at least one type of herpes virus. Fortunately, this virus is
Equine Arthritis in Horses
Degenerative Joint Disease (DJD) Arthritis, often called degenerative joint disease (DJD), is a condition that afflicts many horses. Arthritis is not only painful, but makes it difficult for a horse
Epiphysitis in Horses
Epiphysitis in Horses Epiphysitis, also known as physitis, is a generalized bone disease of young, growing horses that is characterized by the enlargement of the growth plates in long bones
Entropion in Horses
Eyelid Folding Inwards in Horses Entropion is a condition of the eye that is seen in neonatal foals where their eyelids fold inward and press against their cornea. Entropion may
Eating of Non-food Items in Horses
Coprophagy in Horses Coprophagy, by definition, is simply the act of eating dung, or feces. Usually seen in young foals, coprophagy (or dirt-eating, as it is commonly called) is generally
Diarrhea-causing Bacterial Disease in Horses
Intestinal Clostridiosis Intestinal clostridiosis is a disease which causes severe diarrhea in horses. It was not made official or researched much until the 1970s, when Swedish and American workers
Diarrhea in Horses
Diarrhea is not in itself a disease, but instead a symptom of many diseases, recognized when a horse’s feces change in consistency from the normal firm, well-formed fecal balls to
Cysts (Epidermoid) in Horses
Cysts, in general, do not normally affect a great deal of horses. There are many different types of cysts, depending on their origin and where they are located on the
Cystitis in Horses
Bladder Inflammation in Horses Cystitis, though typically uncommon in horses, is inflammation in the bladder. It is not often outwardly apparent that the bladder is inflamed, but there are other
Cushing’s Syndrome in Horses
Could Your Shaggy, Thirsty Horse be Suffering from Cushing’s Disease? Equine Cushing’s disease occurs when a tumor called a pituitary adenoma develops in the pituitary gland. As this tumor slowly