I really appreciate the response/help. Thank you so much! Unfortunately he/she did not make it. I opened up a bit near the egg sac and there was definately no movement. It was fully developed and in the right posision but had not yet fully absorbed the yolk, so even if I had gotten to it sooner...
So it is well into day 31 and there has been movement for 4 days but no pip. I candled just now and saw no internal pip either. I am concerned that it might be too weak. At what point should I intervene? It is a runner duck