Day 20, Small Air Sacs???

[Ducks81]

Day 20 w/my duck eggs, so far so good but I can’t help but feel the air sacs are lagging a bit. Are these guys going to have trouble hatching? I only have 2, my Indian Runner abandoned her clutch & these 2 are the only survivors. I believe same egg, either way their sacs are mostly identical.

 

[Duckpooper]

Day 20 w/my duck eggs, so far so good but I can’t help but feel the air sacs are lagging a bit. Are these guys going to have trouble hatching? I only have 2, my Indian Runner abandoned her clutch & these 2 are the only survivors. I believe same egg, either way their sacs are mostly identical.

They look pretty good for a day 20. The air sacs are the perfect size, so they shouldn't have any issues getting out of their egg. Here's a website of duck egg candeling references for each day:
https://www.metzerfarms.com/Candling.cfm

 

[Ducks81]

Thank you SO much! I’m pretty sure I can find info on this site as well, however what do you suggest for lockdown as far as temp & humidity? I feel like I hear & read so many different numbers...

 

[ChickenCanoe]

I agree, the air cells look perfect for day 20.
According to Poultry Keeper, Runner Ducks need 35-40% and 37.3°C
But I think that is during incubation, the last 3 days should have higher humidity.

https://poultrykeeper.com/incubating-and-hatching-eggs/weight-loss-method-forl-incubation/

 

[Duckpooper]

Thank you SO much! I’m pretty sure I can find info on this site as well, however what do you suggest for lockdown as far as temp & humidity? I feel like I hear & read so many different numbers...

I usually keep the temp at about 97-98 degrees and I keep the humidity at about 75-80%.