About a weeks ago I was brought twelve mallard eggs from a friend of mine who found them on her property and was going to toss them. I gladly took them in and began incubation. In the process of the move, she cracked two of the eggs. Only one worried me, the other egg had a crack at the top of the air sac. Now it has come to hatching time, and the cracked egg that worried me has pipped and is well on its way. What I am worried about now is the fact that the duckling keeps making gurgling noises, and when I peek into the egg I see spots of white film on the duckling itself. There is a slight smell but nothing disgusting. This egg has had me asking questions from the go.. for instance, the egg itself, when candled, did not look like it was fully developed. There was space at the top where the sac is, and more at the bottom where it looked like the duckling hadn't actually fully encompassed the egg. I have never seen this before. What do I do, I am afraid this little duck is going to die inside the egg if he doesn't get out fast enough, my suspicions tell me I am dealing with bacteria here that started forming late in the incubation process... Has anyone ever experienced this before? What would be the best approach from here?