I have three pullets who have just begun laying. One has given me three eggs from when she started four days ago. One of the other two hasn't started at all. One started four days ago by laying a soft-shelled egg from her roost. She hasn't laid at all since! Why is this? Is she egg bound? I looked all over the chicken yard, but I can't find any egg. Extra info: the pullet is a frizzle who is very thin.