I feed 22 percent gamebird crumble, so I leave a huge pile of oystershell out. The chickens go through it. Yesterday, two of my pullets who have not started laying yet were eating the oystershell ... So I am hoping that they are about the start laying. Has anyone else ever noticed their pullets shovelling in the oystershell before starting to lay, and if so, there's the all important question: HOW LONG BEFORE YOU GET EGGS??