@TJAnonymous I'm so sorry for your broody issues!
I candled mine this morning in a hot, not too dark metal shed. I didn't see much detail on day 8, but they all seemed to look about the same. I didn't see any blood rings or smell anything bad, so I let them all stay. I wonder if you have one, if it might be better to put broody number 4 in something like a dog crate you can lock since your girls play musical nesting boxes so much and she might have a staggered hatch and need to stick close to the nest for a few days. Just my 2cents.
