Question 15

What can we do to prevent futile killing of animals?

What we should remember is that zoos are originally places where people are supposed to help and breed animals, not killing them. Futile killing can be prevented by careful calculations of zookeepers and care. This is an action which is what heats up opposing people's arguments, so zoos should be extremely careful about this matter. As I said in previous questions, zoos are crucial to protect endangered species. Many animals are hunted down in the wild, and why should animals be killed in captivity, too? Zoos may not be a paradise, but they do act as a safe place for animals in danger.
What I want to say in the end, is that it is up to us human beings if animals can survive or not. By making lots of researches, I came to know that humans may be the cause of many bad things. We can make mistakes, but we can repent and correct them, too. 

Lists of Pros and Cons of Zoos http://occupytheory.org/list-of-pros-and-cons-of-zoos/