The jumbo seems to have a bigger neck then the regular pekin. I wonder if that's common or just so in Ming Ming. I just love the fatties, your ducks are adorable.
I have a pekin but I'm not sure if she is jumbo or not. She looks heavy weight to me...lol.
Sorry the mallards are not jumbo or even heavy weight at all. I love the heavy weight ducks they take waddling to a whole nuther level...lol