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Compendium EquineNovember/December 2008 (Vol 3, No 9)

Understanding Behavior: Photic Head Shaker

by  Bonnie R. Rush, MS, DVM, DACVIM

    This horse is a photic head shaker. While trotting outside on a lunge line, this horse shakes his head up and down repeatedly. Bright lights will induce this horse to exhibit these clinical signs. Read related article