Tlmcq
Songster
99 for temp is not too high. Does it have a fan? I keep mine at 100 but it has a fan. Humidity is supposed to be higher for lockdown n hatch. If outside breaks the inner membrane will dry out and can be too hard for them to get thru if they haven't broke it and they can't breathe. Was it's lil beak up near the air sac or was it upside down? They will suffocate like that too. Sometimes they just have trouble with the transition from breathing inside shell to outside air. Can be lots of things. Birth is hard whether hatching or otherwise.