I know this isn't a zoo, but I want you to keep this in-mind.
Zoos need to replicate the environment of the animal it has stolen fro nature. That's the least thing humans can due when stripping an animal from its native land. Many of the animals are ARTIC animals. They need very cold environments to be happy. This is not being done. They bed with their "voices" to be released. The ones that have begged too long have run out of energy and simply lost hope. You can see it in their attitude.
Please stop supporting zoos by going there. It's only a business that looks at profit as bottom line claiming to be "educational". You can get better education by watching National Geographic programs. Hell, donate your money to that agency instead. Let's get over the fact that we cage these animals in truly a prison. Think about the vast distances they roam in nature...now look at their small environments. Is relatively smaller than the prison cells we give to humans. Not to mention the temperatures we are housing them in. We should be a more progressed and educated society at this point. Let's stop supporting money-making from mistreatment of animals by supporting zoos.