Blog
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Roan Horse: Coat Color, Genetics, and Variants
A roan horse has a base coat color mixed with white hairs distributed evenly across the body from birth, while the head, mane, tail, and lower legs retain the base color at full intensity. The white interspersion is not progressive; a roan horse does not lighten with age the way a grey does. The white…
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Horse Coat Color Genetics: Base Colors, Dilutions, Patterns
Every coat color a horse carries is the product of two pigments and a small number of genes that control where and how much of each pigment is made. The system is layered: base color is set first, dilution alleles lighten it, and pattern genes redistribute or suppress it. Understanding how each layer works makes…
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Aging a Horse by Its Teeth: Eruption and Galvayne’s Groove
Examining a horse’s teeth to estimate its age is one of the oldest diagnostic skills in equine practice. It works because horses’ teeth erupt on a predictable schedule, wear at a predictable rate, and change shape and angle in ways that correspond to age. The estimate is useful and often close, but it is not…
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How to Measure a Horse in Hands: Height and Withers Guide
Horse height is expressed in hands. One hand equals four inches. The system originates from the breadth of an adult human hand, standardized by Henry VIII in 1541, and it has not changed since. A horse measured at 15.2 hands stands 15 hands and 2 inches — 62 inches, or 5 feet 2 inches at…
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Horse Gestation: Length, Stages, and Foaling
Mare gestation averages 340 days, with a normal range of 320 to 370 days. Breed, season of conception, and individual variation all influence length; draft mares tend to carry slightly longer than light breeds. Gestation is divided into three trimesters. The first (days 1-114) covers embryonic implantation and early organogenesis. The second (days 115-226) is…
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Conformation: Equine Structure, Soundness, and Athletic Assessment
In equine terminology, conformation refers to the physical shape, structure, proportions, and angles of a horse's body. Evaluating conformation means assessing how the individual parts of the horse's anatomy relate to each other and to the ideal standard for its breed and intended use. Good conformation indicates that the horse's skeletal and muscular structure is…
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Vestibular Disease
Vestibular disease is a disorder of the vestibular system , the sensory apparatus responsible for detecting head position and movement and for maintaining balance and spatial orientation. In horses, the vestibular system includes peripheral components within the inner ear (the semicircular canals and otolith organs) and central components in the brainstem and cerebellum. Disease affecting…
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Warm-Blood: Definition and Major Warmblood Horse Breeds
Warm-blooded (or warmblood) is a classification for horse breeds that were developed by systematically crossing heavy cold-blooded draft breeds with lighter hot-blooded Arabian and Thoroughbred stock, with the goal of producing athletic horses with the power and substance of the draft and the refinement, movement, and trainability of the hot-blood. The result is the modern…
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Tumor
A tumor is an abnormal mass of tissue that arises when cells multiply without the normal regulatory constraints governing growth and death. Tumors are classified as benign (locally contained, non-invasive, and generally not life-threatening) or malignant (invasive, capable of spreading to distant sites via the lymphatic or vascular systems , a process called metastasis). In…
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Toxemia
Toxemia is a condition in which toxins , produced by bacteria, released from dying tissue, or generated by abnormal metabolic processes , circulate in the bloodstream at levels sufficient to cause systemic pathology. In horses, toxemia most commonly arises as a complication of severe gastrointestinal disease, infected wounds, or conditions involving extensive tissue necrosis. The…