Do you have the same magpies in Australia as we do here? Magpies in britain are fairly large, black and white with a bluey greeny tint in some of their feathers. I've never known anyone to keep one as a pet though, their just very common in the wild and seem to like places inhabited by humans, I keep catching one in my backyard, which scared me once because i'd let my rabbit out and they have fairly fearce looking beaks!
Hope your Maggie gets better
