Hi DeWayne,
Would her pen happen to be a little darker than where the other hen are penned? The reason I ask is I have a hen that was hatched last year on March 15th. She just started laying this past March 30th. With the weather we have been having, she wasn't able to get out much and her pen is darker than all of my others. It may just be a light issue. Is she looking and acting fine otherwise?
Another thought, are you sure she isn't laying and then eating her egg? Just a thought.