DUCK EGG DAY 28 :) is this progress??

[Morgan231]

my call duck is sitting on this egg its on day 28, does this look like its getting ready to hatch? ive not candled the egg due to worrying that she's going to abandon it however eggs definitely fertile from previous attempts a couple days before she sat on this egg
is the egg pipping? or zipping?

 

[BantyChooks]

It’s very hard for me to tell, given the limitations of images and the blurriness, but I don’t see anything that indicates hatching. I wouldn’t worry about candling it, personally, I candle eggs from my broody ducks & chickens multiple times throughout the set. I have never had one leave their nest.