Day 10 and Different air sac sizes. What should I do?

[UrbanChickFarm]

Hi!

This is my first hatch.
I started with 10 and I’m down to 5 eggs. I can see a lot of movement. We are on day 10 and I noticed the air sacs all seem to be different sizes. Is this ok? Should I adjust humidity. Currently at 99.5 and 50%
it fluctuates from 45-50%
Why would they all have different sizes?
Do the air sacs look like a good size for day 10?
Any help is great appreciated! Really want these little guys to make it.

 

[cavemanrich]

There is not much you can do about the size of the air-sacs at this point. The air-sacks do enlarge as incubation progresses.
Here is a snip for you to view.

It is from this article by Sally Sunshine.
https://www.backyardchickens.com/ar...hatching-chicken-eggs-aka-hatching-101.64195/

Very good info reading for someone hatching chicks.

WISHING YOU BEST,,,,,,,,,,,,,,,,,,,,,,,,,,,,