I have a pet carrier I can use. Going out to the run in about an hour to get started. I'll figure it out. She may not like it, but then again, that may be part of the idea. I don't think she liked it much yesterday when I gave her a not so gentle lift with my foot when she went after one of the Doms. And then continued to chase her away from the group every opportunity I got. Just felt like she deserved a little of her own.
She may have to lay on the floor for awhile, no way I can set things up so she has a nest box..........I don't think..........Hmmmmmm.
Depending on how big she is you could always use a small cardboard box with a hole cut out of the side. If you have some dimensions I could look in the back of the shop at work to see if we have anything that size. Actually I also remember someone saying that their hens prefer an igloo-style cat box (like this one http://www.kittygenius.com/kitty_genius/images/b0002zfopo01a1kv49w6alvud5_pe38_scmzzzzz.jpg ) to lay in. That's what I plan on using if I ever have to quarantine one of my girls.