Duck eggs day 27 safety holes or not

[Jenbirdee]

4 duck eggs in incubator now day 27.5
2 are bigger eggs (Anconas) they both have nice big air spaces and I see some external pipping has begun yay
2 are smaller and their air spaces are pretty small so I’m considering safety holes . I see they have internally pipped .
Don’t want to wait too long
Any advice

 

[KathiQuacks]

How long has it been since they’ve internally pipped?

Usually I’ll wait 24 hours post internal pip to do safety holes, but you can do them now, if you’d like.

After an internal pip, ducklings take about 24-36 hours to externally pip, and then they take an additional 36-48 hours to hatch.