::I'm an example of this "extreme furry", and simply put there is a very large swath of all kinds of animals calling themselves furry ranging from humans to non-humans.  From my experience, furry is mostly composed of humans now days, while were/therian/otherkin is more often composed of non-humans.  Of course determining real percentages is pretty tough so I won't bother to even guess.  I think the lifestyler term used to be used more for non-humans, but now I've seen it used now days more often than not to describe humans who "really" admire non-humans to the point where it effects their lives somehow.  Pretty broad, I know, but all of it is, and it seems to become broader all the time.