Shrink wrapped ducklings dead/dying!!! Help!

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I posted in a different thread about one of my ducklings being shrink wrapped. Thankfully I got it out in time and was able to get most of the membrane off. One duck is fine. Anouther was most of the was done hatching but had stopped making noise and I just found that it has died. There is a forth egg that never pipped... Should I open it and see if I can save the duck?