Breeding Mares That Don’t Show Signs of ‘Heat’

Some mares are “quiet” when in estrus, making them more difficult to breed. Dr. Ryan Ferris of CSU offers advice.
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Breeding Mares That Don
Photo: Anne M. Eberhardt/The Horse

Some mares are “quiet” when in estrus, making them more difficult to breed. Dr. Ryan Ferris of CSU offers advice.

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Ryan Ferris, DVM, MS, Dipl. ACT, owns Summit Equine in Newberg, Oregon, with his wife, Dr. Dora Ferris. The practice specializes in equine reproduction and sports medicine. He graduated from veterinary school at Washington State University in 2007 and then completed an internship in equine surgery, medicine and reproduction at the Equine Medical Center of Ocala in 2008. He subsequently completed a two-year equine theriogenology residency program at Colorado State University (CSU) and worked at its Equine Reproduction Laboratory from several years.

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