My chickens are about 15 weeks old, give or take a week, so in my estimation they will start to lay eggs in another 4-6 weeks. I made some roll out nest boxes, but the problem is that dummy eggs would just roll on out. My solution was to drill a hole through 4 golfballs, then secure the golfballs to the floor of the nest box. Maybe it is not needed, but I thought I'd give it a try. Anybody else use dummy eggs?