Eggs are over due!

[Purpleseabreeze]

Hi just wondering what you do when your duck eggs are 5 days overdue, I candled them two days ago to check they are still moving and they are, but the eggs are going dark in some areas, they are kharki campbells and it's my first experience incubating. One of the eggs has a dark spot that pulses through the shell, is this normal?:/

the date on them is when they were laid not set.

 

[Amiga]

If you could tell us the temperatures and humidity numbers, that might help the hatchers help you out.

Welcome to the Duck Forum (c:

 

[Purpleseabreeze]

Thanks for the welcome! The humidity has been around 60-70% and the temp has stayed around 37 degrees Celsius .