Tonight at bed time I walked in to see one of my hens in a nesting box, and our girls have always roosted, so I was immediately concerned. On further inspection, I found and gently removed what appeared to be a very poorly formed rubber egg from her vent. It was completely exposed and just a tiny piece was stuck. She immediately got up from the box and went up onto the roost with her sisters. She was her normal self all day long. I did not feel any masses that might indicate other eggs stuck. Should I be concerned that anything else is stuck? She seemed relieved afterward, I just want to do the best I can for her. They have free choice calcium supplement along with their layer pellets. Will be a year in August. She's usually a good layer. This is the best photo I could get in the dark.