Overo
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Overo refers to several genetically unrelated pinto coloration patterns of white-over-dark body markings in horses, and is a term used by the American Paint Horse Association to classify a set of pint
A frame overo
Frame overos have sharply defined, irregular, horizontally oriented white patches. As here, they are often bald-faced and white patches seldom cross the topline, creating a "frame" of non-white coat.
A splash overo with some minor sabino traits
A Sabino, called "sabino overo" by some registries
Sabino horse
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Sabino describes a distinct pattern of white spotting in horses. In general, Sabino patterning is visually recognized by roaning or irregular edges of white markings, belly spots, white extending past
Overo
…that are not tobiano. Overo is a Spanish word, originally meaning "like an egg". The most common usage refers to frame overo, but splashed white and sabino are also considered "overo". A horse with both tobiano and overo patterns is called tovero. Frame overo, splashed white, and sabino are three separate…
A sabino horse with extensive roaning
A Thoroughbred horse that carries the W5 allele and has sabino patterning
Sabino patterns have long existed in Arabians