I did a lot of searching on BYC regarding large air sacs because yesterday there was one egg that seemed to have a huge air space. It was like a plastic Easter egg, you know where the 2 halves meet? The larger end of the Easter egg would correspond to the size of the air sac on that egg. I saw movement though. After reading many threads, seems like this alone wasn't necessarily a death sentence. I need to stop handling those eggs.
Meanwhile, Sparkles is running out for super-fast snack breaks when I let them out in the morning and back inside in the evening. She seemed to be re-establishing herself in the pecking order as some previously lower birds were getting in her face and she was staring them down.
All the lock-down questions with the problem-solving and speculation about humidity temp is disconcerting for me as there is no such milestone (that I can detect) with my broody hen. She just sits there, business as usual. I'm thinking "should I mist the air in the coop to increase the humidity?" and then I think "you sound crazy".