Is it okay that she is laying eggs this young? I cant find anywhere on the web of a chicken laying younger than 18 weeks and I'm worried about her health. We got her when she was a day or two so I know she is only 15 weeks old. There was three small eggs in her nest and she was sitting on them this morning. Poor thing, we dont have a rooster. I am feeding her layer and oyster shells (plus mealworms, wheat bread, veggies and fruit) is there anything else I should be doing? Should I be concerned?