Just because she's laying, doesn't mean they need to be incubated!
She doesn't lay that many eggs though!

And she throws Snowy babies!!
I am not sure what it is either. Not sure if you read all my previous info on what I have already done. No gaping, neck stretching or crop adjusting. I though about gape worm but no gapeing. Just the funny squeak from some. I now have 3 who are not being social, kinda puffed up and certainly flemmy sounding. One of them has been doing the squeaking but the other two have not.
I am just willing to try anything and it is obvious it is either contagious or something environmental that is affecting them. I don't think i will go with another round of anti-biotics right now as I just completed one and didn't see any improvement, actually now have more that are acting off than before.
I have been giving them elctrolytes and vitamen with their water also.
Just bleached the waterers and added fresh water with ACV only. I will do the feeder and spray the coop down with some bleach water tomorrow. That's about all I know to do right now.
I really never saw any 'gaping' with mine either, unless I picked up one of the really overloaded bantams... I have a pic of one, will have to dig it up...