Call ducklings pipping

[The Duck Ladie]

I have 3 Call duck eggs on day 25 of incubation. I don't think I have any internal pips yet. I can see movement in the air cell, but I think it's just the baby pushing on the membrane. No peeping yet. At what point should I be concerned? I really want these little ones to make it, so I don't want to miss something.

 

[Jenbirdee]

I’ll try to get help
@New duck mommy 2021
@KathiQuacks