I have checked the air sacs, now on day 15, and some seem to be too small, some too big, and some just right. And they are off by a lot from each other - it's not minor differences. What could be the cause? The books make air sac size seem like a really big deal, and their relationship to humidity. However I am wondering how chickens in particuarly humid areas, like the tropics, don't all have air sac problems. If too much humidity causes small air sacs, why don't all tropical chickens die when they go to hatch? Also, they are weird shapes, not like the perfect crescent shaped air sac I see in drawings.
Just wait it out. I think you're thinking about it too much. You also have to realize that chickens from the tropics have adapted to living there. Thus, the composition of their eggs are different. They could be less porous, thus not allowing as much humidity to enter or leave the egg.
they are fine i have a few like that and they are just fine to better see how eggs are developing they need to be weighed and drop so much weight by a certain amount of time i dont have a scale that can weigh eggs so i just go with the knowldge i have and hope for the best
