Candy replies that he has had the dog for too many years to kill it, but Carlson continues to pressure him. Eventually Slim joins in, suggesting that Candy would be putting a suffering animal out if its misery. Slim offers him a puppy and urges him to let Carlson shoot the dog.
fables are intended to have a moral of the story. The characters are usually animals personified as humans. Most famous fables have been around scince 620 bce.