Nice hen is she wild? Rio Grande maybe? she may have a dietary issue. What are you feeding her? I give my turkeys whatever they want from the kitchen. They love cheese, pasta and most of all grapes. Cottage cheese may help with the calcium and egg shells. My hens may lay up to 17 eggs in a clutch and barely able to cover them with their bodies.
You need to give her a layer feed and free choice oyster shell. All flock is not meant for laying hens as it does not provide the proper amounts of calcium.