Do what you want, because I'm not there and you are. But I would say take the one with no veins showing (no veins, right?) and chip away the whole air cell. If you see any veins or blood, stop. If he happens to bleed a little put cornstarch on it as fast as possible. Have it right next to you. If there is no blood or veins after this, keep going, chipping away just the shell and outer membrane not the inner clear membrane. I think they should both come out honestly. If they're in much longer they may both just die. If you take them out, they still could die, but their chances will be much higher. Good luck. If you have any pics that show the duck in the egg well, you can post those.