Things You'll Need
- Egg shells
- Food processor or mortar and pestle
Instructions
Wash the egg shells thoroughly with hot water. This will remove any obvious debris and contaminants without adding unnecessary chemicals from harsh soaps or cleaning agents. Let the shells dry before moving on to the next step.
Bake the egg shells in your oven at 350 degrees until they are more brittle than usual, about 10 to 15 minutes. In addition to making the eggs easier to crush, this process will further sterilize the eggs. Alternately, you may microwave the shells for 90 seconds to 4minutes, depending on the quantity of egg shells. If you notice the shells beginning to turn brown, stop heating them; the goal is to make them brittle but not to make them change color.
Crush the egg shells with your food processor or your mortar and pestle. The final pieces should not be larger than the size of a sunflower seed.
Mix the crushed egg shells with the chickens' food or sprinkle it on top of their pellets. As the chickens eat, they will consume the egg shells along with their normal food.