RadioLab is a splendid audio show and their latest past few episodes have been quite moving. I highly encourage you to listen to them:

LUCY
Chimps. Bonobos. Humans. We're all great apes. This hour we take a look at what happens when we all try to live together. Is this idea utterly stupid? Or might it be our one last hope as more and more humans fill up the planet?

ANIMAL MINDS
When we gaze into the eyes of our beloved pets, can we ever really know what they might be thinking? Is it naive to assume they're experiencing something close to human emotions? Or, on the contrary, is it ridiculous to assume that they AREN'T feeling something like that? In this hour of Radiolab, we explore what science can say about what goes on in the minds of animals.

PS- click the titles for links to the pages