Heheh... If I'm close, I'll try and not give it straight away this time. Cryptic post time! But hrrmm, the first situation that sprung to mind involved Link... but not normal Link (if I am on the right track you get what I mean)... however, my question is are "no legs" and "four legs" the same as in the original riddle, or are they something more specifically Zelda related, or specifically related to a certain scene? And if it is the latter, is the action less eating, more attacking?
EDIT: Ohhh! Burst of inspiration, I might just have got it now... two possible situations have come to mind, one involving Link-but-not-Link, and one that doesn't and I'm almost certain is right, but I won't post them (yet).