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: My Cat From Hell
Squick: Whenever an owner has an inadequate litterbox, Jackson takes out a blacklight and usually reveals urine stains everywhere except the litterbox.
Or if the litterbox itself is fine, but the owner has been negligent in cleaning it out.
Also, how does Jackson sometimes inspect the litterbox? By running his hand through the litter. True, its to gain information, and he acknowledges that it's gross, but still.