Last night for one and this morning for the other. We broke the "rule" and kinda helped the first one have fresh air (poked a hole, carefully). No movement, no sound and too dry, what we saw. Second one stopped this morning and hasn't been heard from since, checked and think its dead too. Most heartbreaking is that they came from my son's ducks (cayuga drake and khaki duck) and what we saw showed us they would have been beautiful. I'm not sure if the incubator that we borrowed let too much moisture escape or what. We'll still give them a while longer, but this is so emotional.