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An example of a mating system for dairy, dual purpose breeds of cattle and dairy goats aAa®with compensatory elementswas created in 1950 by U.S. Holstein breeder and classifier Bill Weeks and is outlined in chapter 10.2.1. In 10.2.2 CRV’s SAP mating system for dairy cows outlined that is developed to compensate in planned matings the weak characteristics of a cow with strong characteristics of a bull.