Chickens Need Calcium Too

In an extension of the chicken/egg conundrum, Esperanza Pallana, who writes the urban farming blog Pluck and Feather, explains that eggshells are a good source of calcium, a nutrient that chickens require in order to lay eggs with strong shells. Be sure to grind up the shells, though; otherwise your chickens will be confused over what's an edible eggshell and what's not.