Black marks in duck eggs

xx_li_xx

Chirping
Sep 30, 2019
62
117
76
UK
Hello everyone

I am incubating duck eggs, we have 8 that are due to go into lock down on Wednesday, however yesterday I noticed one of them had a black mark inside and then tonight have found another with one. All are moving well , 2 look like they are trying to internally pip , but I am so worried about these black marks.

Any ideas anyone ?

I’ve been such a worry with these as they were shipped eggs and lots of messed up air cells :( all at the moment though are moving and wriggling.
 

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Amc29

Songster
Feb 20, 2019
135
245
146
SW Oregon
I am not 100% sur re, but I believe I have seen something similar in a post about chicken eggs and it ended up being little clots. I believe the chick(s) hatched okay, though. Perhaps this is something similar. Hopefully someonebwho is more experienced/knowledgable sees this and can give you some answers.
 

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