Wilbur was a small, cute, white yipple with a big, black heart-chaped splodge over one of its eyes, that loved to frolick happily in the grass. His owner, a resident of Frostham in the Second Age of Magic, had Wilbur's paws manicured and fur beautifully shampooed.

After being scared by "Dirk Softly", in the Dark Forest, Wilbur fled to the White Cliffs. There, the huge hairy hand of the abominable snowman Pooky shot out from behind a nearby boulder and grabbed the yipple, draffing it out of sight before being devoured. Thus the yipple was never returned to its owner.

SOURCE(S): Legends of Zork