Good morning! The Buff egg with the bruise from yesterday externally pipped through its bruise. Not sure if I should worry. It has a much larger air cell than the others, which is so confusing since they’re all in the same incubator.
 

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Eggshells can have different levels of porosity. Even a hen can have different levels of porousness in her eggs.

Next time, weigh the eggs with a kitchen scale and then reweigh them once a week. I think the goal is 2.8% a week or 12% ish overall. That can help know more definitively where your humidity needs to be. But ducks need a lot less incubation humidity than chicken eggs, so 30-40% is good and then ratchet up for lockdown. Misting can also help draw more humidity out along the way (long before lockdown.) but yeah, ducks drown so easily in their eggs :/


As far as the big air bubble one, it probably had a porous eggshell, lost water weight more quickly, and then by the time the air bubble got that big, it was trapped and couldn't position itself correctly.

I'm not sure how it might affect the duckling if it can hatch well. I would assume it would be undersized so you may need to focus on it with a lot of egg yolk. Hopefully it formed correctly and was able to suck up all the yolk in the egg.
 
Good morning! The Buff egg with the bruise from yesterday externally pipped through its bruise. Not sure if I should worry. It has a much larger air cell than the others, which is so confusing since they’re all in the same incubator.

At this point just make sure it’s still moving and watch for any progress zipping. Once externally piped they can take 24-48 hours to bust out. I normally intervene if there’s ZERO progress at 24 hrs of external pip. It’s possible you’ll need to intervene but don’t stress if you do, just don’t jump straight to doing that.
 
At this point just make sure it’s still moving and watch for any progress zipping. Once externally piped they can take 24-48 hours to bust out. I normally intervene if there’s ZERO progress at 24 hrs of external pip. It’s possible you’ll need to intervene but don’t stress if you do, just don’t jump straight to doing that.
Sounds good. I’m definitely in no rush to assist these kiddos.
 
The external pip didn’t actually go through the membrane. Is that okay? Should I do anything to help or just wait it out?
 

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