What am I doing wrong?? Egg Eaters

[NatJ]

I have a good idea which chick is laying & eating her egg. Yes I provide a dish of oyster shell, but my girls don't seem to be interested in free choice. So I throw a hand full of oyster shell & a crushed egg shell out in their run outside (weather permitting) daily, they really like scratching in the ground/snow.

In that case, I would supplement that hen directly, not the whole flock.