* Increased utilization of proven sires, allowing their services to be available to more owners and resulting in improved offspring.
* Scientific selection of bulls from outstanding cows, enabling mating with the best available sires.
* Early and rapid improvement of young bulls.
* Elimination of the need to keep and handle bulls for the average dairyman, reducing danger, work, and expenses.
* Elimination of venereal diseases through careful health examination of males, regular semen examination, and accurate record-keeping.
* Reduction in the incidence of lethal and genetic defects through intensive selection and record-keeping.
* Facilitation of mating between animals of different sizes without risk of injury.
* Extension of the usefulness of sires unable to copulate normally for physical reasons.
* Enhancement of the value of timid or prematurely erect male dogs.
* Use in females that refuse to stand and accept a male, such as bitches or zoo animals.