Oh, that is an old literary reference, to wit:
“[t]he dog that didn’t bark in the night” is to a point made by Sherlock Holmes in Silver Blaze, a story by Sir Arthur Conan Doyle, where the fact that a dog did not bark during the night when a race horse was removed from a stable was an important clue to solve the mystery of who removed that horse from the stable.”
Thank you.
I enjoy ACDoyle and his Holmes series.
Again, very apropos within this thread.