We give our pullets egg shells, too. But not their own eggs. Why , you ask?? Because they haven't started laying yet!
We rinse the shells, take out any residual albumin, dry them and crush them up. I think letting them dry in the carton and zapping them in the microwave is a good idea.
We give it free choice in a little cup or sprinkle some on the ledge in their run.
We rinse the shells, take out any residual albumin, dry them and crush them up. I think letting them dry in the carton and zapping them in the microwave is a good idea.

We give it free choice in a little cup or sprinkle some on the ledge in their run.