I feed her seed and high protein crumble mix as well as veggies and grass when i can, she is on her own sadly we just lost most of our new hatch due to humidity issues, probably about 6 -10 months old.
At first i thought it was after it had been laid as the hole always appeared to be on the bottom so i have put heaps of stuff in her dust bath, now I'm not so sure, it doesn't look at all like she pecks it so it must be already like that or maybe it does happen when its laid and hits the ground. It happens about every 2/3 eggs