Under mature but over due?

SarahCuth

Hatching
5 Years
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Jul 6, 2014
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Hi, I incubated 12 call ducks on 7th June and now it's day 29/30 (I say 29/30 as I started the incubation in the afternoon after I had let the eggs settle from being mailed.) out of 11 that survived posting, 5 have developed.

Some literature says they are due to hatch in 25 days where other says 28 days. So working on being 3 days overdue to be on the safe side, and checking for movement and veins by candling decided that I would assist with the hatching after reading that call sucks are extremely hard to hatch by them selves.

I slowly pealed back small pieces of shell from air sac end and broke the membrane which was very thick and white. There was lots of moisture inside so I was hesitant but the duckling was wriggling lots. I have noticed that there are still a few blood vessels and some yolk unabsorbed. I have left to rest half shell open and left the others as now I am totally unsure what to do for the best?

It looks as though it's not fully formed yet but should be well over due, I have double checked my dates. I feel awful now that I have interfered with nature. But truly thought I was helping.

In the past my ducks have alway incubated the eggs themselves.
 

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