Hatchi Wan Kenobi
Premium Feather Member
It's best not to open the incubator if it's not necessary, but you can definitely open it without it causing the hatching ducklings to die, even if they are pipped I open the incubator during hatches all the time with no ill effects. So, while it's best not to if it's not necessary, opening it will not kill ducklings. You'd just want to make sure the humidity went back up quickly afterwards.Was the mark or vein looking thing on the egg possibly a crack or external pip? That maybe the cause of your humidity fluctuations and if so, you do not wanna open the incubator...that is very important. If you open it during hatch it could cause them to be unable to hatch and possibly die.