I have a one year old Easter Egger hen who is consistently laying eggs with paper thin shells. Last winter she was attacked by my son's dog and she survived the attack but lost almost all of her tail feathers and a lot of them on her rump. She recovered nicely but did not lay over the winter (I expected she was putting her energy into growing her feathers back). All my birds started laying again in March when the time changed and the days got longer. She started laying again, but since then most of her eggs have been very fragile. Very few of them have been strong enough even for me to bring them inside. I provide my hens with egg laying feed as well as oyster shells. I recently also started adding vitamin D to their water because I heard that if hens don't have enough vitamin D their bodies can't produce the calcium that helps them lay strong eggs. That hasn't seemed to help. She lays about every other day and I usually find the remnant of a broken shell with a yolk inside the nest box that she uses. I think her egg laying parts may have been damaged in the dog attack. Could this be possible? Will she ever get back to laying good eggs again? I'm hoping the rest over the winter will help her. All four of my easter eggers stopped laying in the fall last year and I have already noticed they have slowed down their laying this fall so far. Thanks for any tips or advice.