I grew up with Bird Dogs until there weren't any quail left in East Texas.
After that, I have had Hounds.
All have had amazing eyesight especially at night.
But their sense of smell is truly amazing. You cannot hide from them; they will find you, even when 2-3 month old puppies.
My wife claims that if the wind is hard out of the South, they can smell me and my truck coming from town four miles away.
She says they will put their noses up in the air and start whining. They will even sometimes start heading to my gate (half mile) to meet me.
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"Filet that fish? Hell naw! I'll scale him, gut him, fry him up in grease, take him by the head and tail, and play him like a French Harp!" - Uncle Paul sometime in the 60s.