HERDA: Not Just Skin Deep

Today, it is primarily through Poco Bueno’s bloodline, say researchers at Mississippi State University and Cornell University, that the recessive gene that causes hyperelastosis cutis (HC) has passed. In some scientific circles, the disease is called hereditary equine regional dermal asthenia (HERDA).
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Poco Bueno was a giant among horses. Built like a rock, he possessed power and speed. He was a champion in the show ring, then retired to stud. His greatness was carried on in succeeding generations of Quarter Horses.

Today, it is primarily through Poco Bueno's bloodline, say researchers at Mississippi State University and Cornell University, that the recessive gene that causes hyperelastosis cutis (HC) has passed. HC is a brutal affliction that carries with it a death sentence. Although affected horses can be made more comfortable and their lives prolonged, there is no cure. In some scientific circles, the disease is called hereditary equine regional dermal asthenia (HERDA).

HERDA is a term favored by researchers at the University of California, Davis (UC Davis), while researchers like Ann Rashmir, DVM, MS, Dipl. ACVS, associate professor of surgery and head of the Hyperelastosis Cutis Research Program at Mississippi State University, and Nena Winand, DVM, PhD, a geneticist and assistant professor in the Department of Molecular Medicine at Cornell University, opt for hyperelastosis cutis. Rashmir and Winand are collaborators on hyperelastosis cutis research.

"It doesn't matter what you call it," says Rashmir, "it's the same disease." For the purposes of this article, we'll use HC

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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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