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Analyzing | by Gígja Einars..
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Analyzing

The lifting of the upper lip (called flehmen response) helps a horse more clearly smell, analyze, and process a scent in their environment. Horses of both genders may perform the equine flehmen response when tasting a new food, having a new horse introduced to their herd, or scanning an area for predators.

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Taken on July 22, 2008