What is the origin of the saying "Red Herring"?

Question

I heard one opinion today and was wondering if it was the right one.

Answer 1

In literature, a red herring is a narrative element intended to distract the reader from a more important event in the plot, usually a twist ending.

The term "red herring" originates from the tradition whereby young hunting dogs in Britain were trained to follow a scent with the use of a "red" (salted and smoked) herring (also called a kipper). This pungent fish would be dragged across a trail until the puppy learned to follow the scent. Later, when the dog was being trained to follow the faint odor of a fox or a badger, the trainer would drag a red herring (which has a much stronger odor) across the animal's trail at right angles. The dog would eventually learn to follow the original scent rather than the stronger scent.

In literature, the most commonplace use of a "red herring" is in mystery fiction. One particular character is described or emphasized in a way that seems to throw suspicion upon that character as the person who committed the crime: later, it develops that someone else is the guilty party.

Answer 2

It was too much to cut and paste, but the site below lists the meaning and VERY detailed origin of the phrase.