I put a couple of duck eggs in my incubator on the same day. One hatched a cute little mallard 3 days ago. The other egg I'm thinking may have died. I have a couple of pictures: At the top of the 2nd picture, there is a dark protrusion into the air space that looks like it was maybe starting to internally pip, but I haven't seen any change in a couple of days, and haven't really noticed any movement either. I'm new to incubation, so I don't really have experience to know whether to keep it going a couple days longer, or if I should toss it. Anybody have any ideas?