Stephen Fry and kakapo. How awesome. :D I have the book out from the library but haven't yet read it.

The movie you're looking for is called Felidae. It's actually based on a book that I have (translated to English from original German), as well as its sequel. The author's name is Akif Pirincci. (Edit, because I lost my train of thought) So if you'd like to borrow it after rewatching the movie, be my guest. :)