I have a 15 mo old Dark Cornish who recently started laying funky shapped eggs...flat on the bottom kind of oval shaped eggs. Today she layed an egg with no shell...not even a membrane around it (and in the water dish at that). She has access to oyster shell at liberty and is a free range bird. I feed her layers crumbles and whatever scraps come from the house. I have 8 other hens and they are all laying just fine. I recently added a roo to the mix (month or so ago) but she (Peepers) only started with the funky shaped egg thing 5 eggs ago so maybe 6 or 7 days. I thought about her maybe getting to much salt in her diet but i don't usually cook with salt and am not much for processed foods either. Stove Top once in awhile and the occasional frozen pizza but not enough to effect anything I dont think. I read somewhere to add vit D to the water but i dont want to medicate the other hens who may not need it. OH and another thing with this hen...about a month ago she developed a growth on her head. It free moving and ony got about half the size of a marble then stopped. The Vet said she shouldnt need anything and that it sometimes happens and to just monitor it in case it gets bigger. Any suggestions...?