Stud books are used to record the pedigrees of purebred horses and have long played a critical role in breed improvement. But, despite the Clydesdale’s enormous popularity around the world ...

Horse breeders pay stud fees, which can run in the hundreds of thousands of dollars, for the privilege of mating their female horses with particularly fast or well-bred male racehorses.

Narrator: Super-fertile stallions like Big Star can ejaculate once a day. Theoretically, this means he could produce over $20 million worth of semen during an eight-month stud season. And if a ...

"We were able to screen a worldwide collection of horse DNA samples and study where modern stallions trace their roots to," Cothran said. "Horse breeding has been linked to human history for ...

In commenting on Khozan’s relocation to Ocala Stud, Journeyman’s Brent Fernung said, “Standing stallions is a seven-day-a-week job. Crystal and I decided towards the end of last breeding ...