Horses with the hereditary skin disease known as hereditary equine regional dermal asthenia (HERDA) or hyperelastosis cutis (HC) have been recognized since the 1970s, but only recently have researchers defined just how much weaker their skin is compared to that of healthy horses. At the 2009 American Association of Equine Practitioners Convention, held Dec. 5-9 in Las Vegas, Nev., one study

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