Animal Voices is a long-running radio show and podcast out of Vancouver BC that you might want to check out: http://animalvoices.ca/
I'll look for Imogen's suggestions! I had not heard of them before. Thanks!
I don't enjoy listening to Our Hen House or Colleen Patrick Goudreau - not because of the content, which I love, but because of the tone of voice and delivery. It makes me sad, but I just can't listen to either for very long. But obviously that's my own personal taste, because both those podcasts are hugely popular.