It's definitely difficult sometimes, deciding what should or shouldn't be slain for our own use. As hunter-gatherers, though, every thing at least gets put to good use. Even the bones are used for carving or instruments! At least...that's what I've heard. My ocarina is carved from whale bone.
Does the pretty eyed (and hair) lady have a name? I haven't properly met 99.9% of the island from this time!