I went out to check on the girls tonight and found that they had once again pushed aside the chicken wire that Thomas used to block the nesting box. ZsuZsu was actually trapped behind it, peeping away as if she were still a wee little chick. After I offered her a few grapes, she was able to squeeze around the wire and hop out into the run.
After popping off the side of the Eglu, I reached in to move the wire back into the nesting box. This did not go over well with the girls, who protested loudly, as if to berate me for ruining all of their hard work. I scooted them out the door and tried again.
The wire was nicely seated in the nesting box until ZsuZsu came back in. I watched through the opened side of the Eglu as she wiggled and squirmed her way into the box, half nestled under the wire. They are definitely not fans of the roost.