I know some people do tie them off, but I think doing that is risky. If the yolk sac ruptures there is a good chance all the remaining yolk will drain out and that the duckling will get an infection.
Hatched on Sunday, so it can take up to ten days for them to digest all of their yolk.
Hatched on Sunday, so it can take up to ten days for them to digest all of their yolk.