OK, so I knew from reading posts here it was probable that at some point, my 23 week old Red Sex Link would lay a shell-less egg, but boy do I wish I had thought to bring a flashlight to the coop yesterday afternoon. Joy was in the nesting box at 4 pm when I left to run errands, and so I blithely went straight to the coop when I got home (it was dark by then) and lifted the lid. I could see a shadowy outline of an egg and reached in to pick it up. Ack! It was a dreaded shell-less egg, all cold and rubbery.