When I went to Thailand a couple years ago, we went and saw the tigers. While we enjoyed being around “wild” animals, we despaired over the fact that they were quite likely drugged. Or at least the adults were. Yet we went anyway.
When in Buenos Aires, I was again faced with the ethical dilemma of visiting a zoo that possibly drugged its animals. The TripAdvisor reviews were mixed. About 20% claimed that it was unethical and the animals must be drugged. The rest made no mention of the fact. The website claimed it raised the big cats with dogs and domesticated them.
In the end, curiosity won out and I went. And I am glad I did.