I was okay with the idea of zoos as centers of conservation and education...until I worked in one. Basically, it is like a museum, only the exhibits are living animals instead of oil paintings or artifacts. Meaning, exhibits are regularly loaned out to other zoos, or swapped for other animals on a very regular basis, in order to keep up the public's interest and bring in revenue. Some of the animals never have a permanent home, but instead are shipped across the country (or the world) several times in the course of their lives, only to arrive in a new place that doesn't necessarily know how to care for them. You can only imagine the stress that this causes, to have their environment and diet and caretakers switched every year or so. On the upside, this could prevent them from being stuck in a bad situation for their entire lives, but I still just can't stand the idea of animals as a commodity.