Did Bill Ferny die?

[Hookbill the Goomba]

I'm with Eomer on this one. He obviously died eventually. I don't think he was immortal. He probably became wretched and Gollum esque. Though perhaps not SO extreme, but you know what I mean.

And Bill being thought by some super intelligent cow? Interesting theory Mithalwen, though I doubt Tolkien would write such and event down, then his work would lose a lot of credibility.