I used to compost my eggshells but feeding it back to the chickens makes more sense economically, plus any of the tiniest pieces can still get dumped into my compost once the chickens pick out the larger pieces.It seems a waste of their body resources to throw eggshells away doesn't it?
That's a cool idea! I've been crushing them in a paper towel (but they tear) or plastic baggie (but you get jabbed by pointy bits) but denim sounds ideal since it's tougher and I always have old jeans around in the rag bin.I'm a fan of re-using egg shells. We use an old pair of blue jeans to accumulate egg shells, the foot holes are sewed closed. Once it's mostly full we stomp on the blue jean shell bag over a couple of days, until the pieces are relatively chicken bite size.