@lozerface79
I finally de-broody-ed my Bielefelder hen... I just kept pulling her out of the nest box, I her up on a roost on Sunday night and she stayed there. I opened the nestboxes in the morning, and she was already out with the flock. She went in and out during the day, but the box she had been using was occupied and she finaly gave up! Mistake was not putting her on the roost last night because she slept in her least favorite box because the others were covered up...
Can't figure out if I am

or

at least I know what I should have done 3 weeks ago! I was just about to put her in isolation! She must have sensed it.
I guess I am really

e
If you can, pull her out of the box and get her scratching around with flock. And put her on the roost - It took a weekend of harassing her! Good luck!