I have 3 hens. my Orp is the top of the roost and was sick last year and recovered. She started laying again this winter but the eggs are soft or shell-less. She often lays one in the coop not the nesting boxes before I even let the girls out at sunrise and I am not sure how early in the morning she is actually laying. All 3 hens have access to the same layer crumbles. Also there are oyster shell set out as well but she has no interest in them. Any suggestions? It seems to be more a production issue than calcium intake.