Can't really add much to the discussion as I know nothing - where's tiompan when we need him? :-) but I enjoyed reading your post. I'd love to visit someday.
I'm pretty sure I can see the eye you are talking about (looks like someone's given it a beard as well!)
If it's a goat, would that rule out a date of 12,500-12,000 years ago? Anyone got a rough date for introduction of goats to these isles?