Duck eggs air cell way too small! Help please


Minion King
Premium Feather Member
5 Years
Mar 24, 2015
Slowly Losing it......


For the Love of Duck
Premium Feather Member
5 Years
Nov 30, 2014
Middle Tennessee
The air cell looks like somewhere around day 10 on the guide from this site, but it's day 21. Humidity has been around 50% throughout incubation. How much can I safely lower the humidity to compensate before lock down? Is 35% safe?

I would run the humidity at around 30% until you notice that the air cells are starting to draw down. Then you can raise the humidity to 65-70% for lockdown.


Also, I would start misting or sponging them twice a day... sounds counterproductive but the evaporation of water off the egg shell helps pull moisture out more and quicker...

Just fyi, I usually run all my duck eggs at about 30% if not a bit lower and that works best for me... :)


In the Brooder
Feb 4, 2016
Thank you all for the advice! I did remove all water from the incubator, and it's been sitting at 30% humidity since yesterday just after I posted. I also realized when reading some links yesterday that I was at day 20, not 21, because the day I put them in was day 0! So that gives an extra day. I also started spraying them last night. I will try that twice a day.

I was wondering if there is a level of humidity that is dangerously low. I saw someone else on this forum had suggested on another page that it could be lowered to 15-25% using rice, but I wondered if that might be dangerous.

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