Rather than the erroneous claim that hogs have "poor eyesight" it is far more accurate when stated as this...
"Of the senses hogs use for advance warning, the eyes are not their greatest... Hearing is far more used as the ears are straight up when head is down feeding and ears are "articulated" in that they aim them... But their sense of smell is one of the keenest in the animal world..."
Brent
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