My first hen to start laying didn't like the multitude of choices we offered her for nest boxes. She found the canvas folding chair on the porch more to her liking. At 4 PM every other day she would jump up in her chair and lay her egg. Since we were in the process of moving them to their permanent coop I let her have her way until yesterday; which was her regular day to lay. Yesterday and today they've been locked in the new coop. Every time I'd go out to check on them this hen would let me know just what she thought of the new arrangement. She would also try to beat me out the door to go to her chair. I'd pick her up and put her in a nest box. She'd jump down, screaming at me, and head right back to the door of the coop again. Finally late this afternoon she gave up and decided to lay in the nest box, but it's a weird egg. It has a scratchy surface, like fine grit sandpaper. It's also thin-shelled and almost white. Her previous eggs were always very thick shelled and brown. Did keeping this egg in too long cause this?