How would you suggest I check? Will i need to do Safety hole? Or better not to? I’ve read online, and there were tons of mixed answers both google and on BYC.
I would suggest very carefully candling the egg, check for signs of internal pipping and movement. I’ve seen mixed reviews on safety holes as well, but I think I’ve seen more good reviews than bad ones on here. I would certainly look into it more if I were you. Research is the most important thing here.
If you do candle, try your best to not rotate the egg. You don’t want to accidentally turn the baby. That’s why lockdown exists- so that the baby doesn’t get moved while it is getting into position. Your best bet would be to leave the egg alone entirely unless you are worried, or unless you want to create a safety hole.
If you do the safety hole, be extremely careful. It is recommended that the safety hole is only used if the baby has yet to pip externally after about 24 hours of pipping internally. Though, ducks are slow hatchers, sometimes taking about 24 hours to externally pip on their own. Also ensure that you don’t make the hole too large- it could dry out the membrane, and a dry membrane is very bad for the prognosis of a baby. When making the safety hole, don’t turn the egg. Same idea as the whole candling thing.
I’m no expert, so please do more research! I’m sure you will do very well for those babies. I’ve never hatched ducks before, but I’ve spent some time on here. That’s the only reason I know any of this really. So I would suggest poking through some threads that ask questions similar to yours, and see what some more experienced people think. I’ve got some good insights that come from hatching chickens in the past, but like I said, never hatched ducks. I hope this information finds you well!
(Please do update on the babies, I would certainly love to see them

)