The solution is don't throw out your eggshells. Feed them back to the chooks as they contain the very calcium they need to re-form the egg! Kitchen scraps with eggshells and you should continue to get the eggs! A bag of shell grit and mixing a small amount into your veggie scraps also suppliments the lower traces of calcium in the soil. With these 2 things, you could survive almost indefinitely without the need for pellets (along with the veggie scraps) and continue to get eggs when the pellets run out!