Let’s say you are on an airline run by a culture you know is different from yours. You respect this culture and its people, yet you must acknowledge that there are some significant differences. For one thing, they eat dogs and cats.
You request the “non-pet meal”. The people who run the airline understand that you are from a different cultural background, and they respect that. They honor your request for such a meal, as foreign as the idea may be to them.
When the tray arrives at your seat, it is indeed a pet-free meal. Yet you also see, incongruously, a fried puppy appetizer on your tray.
“I did not order this,” you say to the flight attendant.
“That appetizer comes with all the meals,” she explains helpfully.
On your return flight, you receive a side dish of roasted kitten. You now understand that there is no point in raising a fuss. You offer the dish to the young woman sitting next to you. She is delighted to accept it, and eats it with relish.
This has pretty much been my experience on several recent flights, with just a few culture-specific details changed.