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The Dosage system was developed to provide breeders and bettors with a numerical way to evaluate the balance of speed and stamina inherited by a horse. The method is not a magic formula; it was built from the observation that a small number of influential stallions transmit traits of precocity or stamina to their descendants. At the beginning of the 20th century, the French military officer J. J. Vuillier began identifying these sires, which he called chefs-de-race (literall