Digestive System
See also: Equine nutritionHorses and other Equids evolved as grazing animals, adapted to eating small amounts of the same kind of food all day long. In the wild, the horse adapted to eating prairie grasses in semi-arid regions and traveling significant distances each day in order to obtain adequate nutrition. Therefore, the digestive system of a horse is about 100 feet (30 m) long, and most of this is intestines.
Read more about this topic: Equine Anatomy
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