Trimurtisan
Flying by the seat of my pants!
I don't really know the correct answer for that. But I do know I had a chicken externally pip on the wrong side just a couple days ago. It came out perfectly healthy, and I have not noticed anything at all wrong with it. I hope you have the same results.Its just as i thought. The ducks head is on the opposite side of the egg away from the air sac. I just checked them and i noticed an external pip on the one that hasnt pipped the air sac yet. It still hasn't so i dont know if that will affect the duck when it hatches