Hi I have incubated a dozen home laid duck eggs, I had the humidity at 55%, took down weights butthe most weight they lost was about 9%. Figured this out too late to make much difference and the air sacs were pretty small. Candling showed movement in all eggs at day 22, most appeared ok at lock down. One pipped on due date but failed to hatch. Follow up on day 29 showed membrane was stuck over the top of beak and the yolk sac was still very big. I floated the remaining eggs after candling. 3 Floated, The rest sank. But one of the sinkers appeared to move. I dried it and replaced it in the incubator. What I am wondering is, could the sinker actually be a live duckling, and if so wgy didnt it float and should I intervene? This is my first time incubating eggs and I dont want to risk killing a duckling if it is possibly alive. Any thoughts would be greatly appreciated. The chicks that were incubated at the same time hatched fine and their air sacs were small too, but they are different animals afterall.