Well, I didnt see anymore movement in the remaining cayuga eggs so I checked them again this morning and they are in the exact same spot/position as when I candled last night. So I think they are DIS?
This is happening to me a lot - everyone makes it until the first handful hatches, and then the rest die. In the Janoel I don't think it's humidity related as it is super hard to keep humidity high in that thing and it rarely goes above 70% even after someone has just hatched. In the Brinsea, the humidity spikes to 99%+ (99% is the max on my hygrometer) after someone hatches and can stay that way for a long time if I dont open it (and I try not to because there's usually someone pipped!) Could this be drowning chicks/ducklings that haven't pipped? All three ducklings that had external pips hatched successfully, the other three I am pretty sure are dead, but they were alive and well just 48 hours ago. It is D26. What gives? Any ideas? Should I poke a hole in the remaining eggs to see what's going on? (I know I just told someone to sit on their hands; it is so hard to do that when the eggs are right in front of you lol). This is super frustrating.
Drowning doesn't happen if they aren't internally pipped and if it were drowning there would have to be water built up inside the air cell from long period of high humidity at hatch. While the humidity spikes when chicks are hatching it isn't usually enough to cause this BUT if you see condensation building up on the window in your incubator that's usually s sign that it's too high and can also be building up in the egg.
Malpositions, sticky chicks, and shrink wrapping are all also common causes for late losses that can be seen if you decide to do an egggtopsy. If they quit earlier than you realize then you're likely to see some more loose fluid inside the egg where the chick is but not necessary the air cell, that's because of decomposition. Sometimes you can do an eggtopsy and it's still hard to identify what exactly went wrong.