Black Dog:

Coat, blacker then night, this doesn't gleam in the moonlight like a coat of a living dog.

Eyes, some report eyes glowing of evil; others tell of terrible, emty black pits.

Claws, these spring viciously from huge paws that no sound as the monster lopes along. The paws also leave no prints, evan in the softest soil.

Mouth, the teeth are hideously long and sharp, and foul saliva reeking of sulfur may drool from the beast's jaws.