Battle Over $200-a-Vial Bull Semen May Rock Dairy Farms

  • Rivals challenge Sexing Technologies' dominance in breeding
  • Dairy farmers use sex-sorting to get milk-producing females

Cattle return to a barn after being milked at a dairy farm in Illinois.

Photographer: Daniel Acker/Bloomberg
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When it comes to breeding cows, Oakfield Corners Dairy in upstate New York would rather not let nature take its course.

To ensure his prime milk-makers produce daughters, Oakfield partner Jonathan Lamb is willing to pay as much as $200 a vial for bull semen that has been processed so that it only contains X chromosomes.