I've tried to move my silkie and she just moves back, though I didn't put her into a box that she couldn't roll the eggs out of. I think she will sit wherever you put her as long as she can continue to sit.
***WEAR GLOVES***
My girl is downright vicious. She has an amazing backward thrust peck. I can't believe she can get that much power and precision in such an odd angle. Almost drew blood once. AND she HOLDS on to the skin when she gets a hold!
I always wear gloves now if I need to move her. She doesn't get up for anything and poops where she sits, so I need to move her to clean it out.