I’m so sorryThank you so much! You're right, there IS a ton of helpful info there. sadly, I'm almost positive that's what it is, and I've never had my flock vaccinated. All the signs/symptoms match all the things I have been noticing. I think the most I can do now is give the flock as much help as I can and try to keep them healthy. I just wonder if it wouldn't be kinder to the poor hen to cull her.

If she is suffering I would say it would be kinder to cull her. Keep a close eye on your other birds. Keep us updated. Sending you lots of positive thoughts
