I had one of my chickens have a egg shell stuck in her...and there was no egg in it. The shell was soft/leathery. There was no sign of egg in the nestbox or on the ground. It was poking (about an inch) out of her bumm for over an hour. I watched to see if it came out, but after awhile I worried so I picked her up and took care of it. I put a warm damp rag on it...as it wouldn't pull out on its own.I think it was dried to her vent skin. After a few mins I tried again and it slipped out whenI pulled on it.It didn't seem to bother her at all. I let her down for a bit...then awhile later I caghter her again and washed her bumm. She doesn't seen bothered at all. Should I worry?