What I like is when they charge an extra “cleaning fee” if you have a pet. I always ask why they don’t clean all the rooms as best they can every time pet or no pet. I usually try to ask this when there is a line of people behind me checking in so everyone can hear the non-answer.
That's because the people behind the desk at check-in probably haven't studied economics. My reply would be:
In case your pet does have an accident, did you bring disinfectant and carpet shampoo, or should we just charge the next guest to occupy your room?