The TBN Ranch ladies are given crushed egg shells on a regular basis.

This is an incredibly informative article by Jill Winger from The Prairie Homestead.

Like anything else, there seems to be lots of different opinions about feeding eggshells back to the chickens who laid them. However, one thing that everyone agrees on is that laying hens need a lot of calcium… Continue Reading  

Another great article about 30+ Things to do with Eggshells