Well, I did a goblin with hooves back on the Engraver's Guild thread (unedited pencil sketch), and some vague memory of seeing that might have triggered his idea to give it hooves (probably a good way to mark it as non-canon, seeing as how DF is ascii and most physical features described allow for somewhat broad interpretations)
Now, why my goblin had hooves is another story entirely. One that would take awhile to explain. Suffice to say it did not have some of the other . . . features Deon's had.