My hens are about 20 weeks old and have been laying for about a month. This is the fourth egg I have found intact without a shell. When I pull open the egg it looks exactly like an egg with a shell. I don't know what to do. All my hens seem fine and the other eggs I have been getting have nice hard shells. Harder than store bought eggs. I was wondering if there would be something wrong with one of my hens because of this. I am worried that when she starts to make "shell" she will have problems. The eggs are layed inside the nest with the other hens' eggs. They are given layer mix, oyster shell if they please, I pick and cut alfalfa from the field and grass for them. No chemicals or hormones are given in feed or otherwise. They are penned in at all times and given treats of bananas, fresh corn on the cob and cantelope a couple of times a week. I have EE, Straight Run Red and Cochin chickens. One Cornish X who lays her eggs in a nest on the floor.