One premature, dead duckling seems like a fluke. A second full term dead duckling seems like something is wrong. I have two Muscovy ducks who have been swapping eggs and sharing their nests. Last night, one took several eggs that looked close to hatching. This morning she only has one egg so I am assuming the others were swaped back. But I found a second dead duckling. I don't know what's going on, but I think I'm going to look for those eggs that looked close and move them to the hatcher. I have a GQF cabinet hatcher. I normally have it at 100 and 68% humidity for chicken eggs. I haven't tried duck eggs and I know Muscovy ducks are a little different than Mallard ducks. Does anyone know what the temp and humidity should be?