Grinding egg shells

[GC-Raptor]

I don't wash, microwave or bake in the oven.
I put them in a small paper plate for 2 days or longer to dry. . Then I crush with my fingers, its very easy. . Then I put them in a quart size pail. , and feed to hens at my leisure. GC

 

[lazy gardener]

I just collect the egg shells, toss them in the run and give them a stomp. No worries about the chickens "recognizing them as eggs".