Yesterday, my wife noticed that a few of our chickens' eggs shells were a little on the thin side. I knew that we could give our chickens their eggshells back to them to give them the needed calcium in order to make their new eggs stronger. The only thing that I was worried about was giving our chickens a taste for their own eggs. I figured that by washing them and then crushing the shells pretty small, but not powdery, that they would not resemble the eggs that they lay.
Step 1: Wash the used eggshells to get any residual egg out of them. I just opened them up, placed them in a collender and and washed them with hot water.
Step 2: Lay out the eggshells on a baking sheet and place in the oven for 350 degrees for 10 minutes. This will kill any bacteria and dry them to make them easier to crush.
Step 3: Crush the eggshells. I used a mortar and pestle to crush the eggs. Now they should be ready to feed to our chickens. I'm going to put in in a small feeder and leave it to the chickens for whoever wants to eat it.
I hope that this helps you if you discover that your chickens' eggshells are getting a little thin.