We have 7 chickens around 25 weeks old. We get 7 eggs almost every day. Once in awhile we get a soft shell egg or find one under the roost broken. Today my dh moved a Rhode Island Red from the lower roost to the upper roost and she got mad. He watched her drop the thin shelled egg from the roost. What could be going on? The egg shell is almost see through. She lays regular good eggs most days.