These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Danny the Dog
Complete Monster: Bart. The man took in Danny after the death of his mother (whom he killed when she refused him) and spent years turning him into an unthinking, unfeeling killing machine. He made Danny into an animal, programmed to fight when his collar is clicked off, and used him to beat uncooperative debtors into submission.