I went out about 6:45 this morning to let the girls out. I heard the song when I was about halfway there. When I opened the door, there were our first two eggs laying on the coop floor below the roosts. They had either broken after they were laid (likely) or been pecked or been laid with little or no shell. Is it common for the first few eggs to be thin shelled or maybe non-shelled since I just today put out their oyster shell? Also, aside from the golf balls, how else can I encourage the ladies to lay in their nests, or will they just "get it" after time?