Dual Hemisphere Breeding

Thoroughbred breeding stallions truly have joined the jet set. These four-legged  Romeos are flying from one part of the world to another these days as they perform breeding duties on both sides of the equator. Hundreds of

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Thoroughbred breeding stallions truly have joined the jet set. These four-legged  Romeos are flying from one part of the world to another these days as they perform breeding duties on both sides of the equator. Hundreds of stallions from other breeds also have joined the jet set, but in less dramatic fashion. Because artificial insemination is permitted in most breeds except the Thoroughbred, these stallions remain at home, but their semen is sent to mares in other lands.

Given the speeds that jets can travel, fresh, cooled semen can be collected in Europe and hours later arrive in the United States. Frozen semen also is utilized, but its viability does not yet match that of fresh, cooled semen.

Shuttling Thoroughbred stallions and shipping semen for other breeds have truly "shrunk" the horse world. A Thoroughbred stallion which bred a mare this spring or early summer in the United States might be standing at stud in Australia or New Zealand this fall and winter

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Les Sellnow was a prolific freelance writer based near Riverton, Wyoming. He specialized in articles on equine research, and operated a ranch where he raised horses and livestock. He authored several fiction and nonfiction books, including Understanding Equine Lameness and Understanding The Young Horse. He died in 2023.

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