Ever notice how unhappy some of the zoo animals look? And why are some dying of cancer - that would be impossible in the wild. In the zoo they are fed and exposed to the same toxins that society is exposed to, causing cancer. It's definitely an eye opener. I know the zoo keepers are trying to help these animals but we have to rethink all our practices now that we are aware of the toxins in our air and food.
Pic of unhappy Lemur at the Toronto Zoo (photo by me)