Things You'll Need
- Metal tray
Instructions
Collect eggshells.
Wash the eggshells thoroughly.
Place the eggshells on a metal tray.
Place the tray of eggshells in a 200 degree Fahrenheit oven for one hour.
Remove eggshells from the oven and allow to cool.
Crush the eggshells into very small pieces. This can be done by placing them in an empty cereal box (the shells will pierce a plastic bag) and flattening it with your hands, a rolling pin or other heavy object. Make sure the pieces are very small, both to allow for digestion and so the chickens don't recognize them as eggshells.
Feed the eggshells mixed with other feed or oyster shells, or in a separate pan that they can pick at as they choose.