Hi Scott, Thanks for reaching out! The risk here is that the hardness and brittleness of the shells could damage the chipper’s blades rather fast. It’s like using a butter knife to cut a steak – technically possible, but not really what it’s made for, and you might end up blunting the blades very very quickly. Of course these can be easily sharpened or reversed (if you own a Forest Master wood chipper) but with how quickly I believe they’ll blunt I don’t see this as a sustainable option.

For disposing of clam shells, composting them might be a more suitable option. They break down over time and can add calcium to the soil – a win-win for your garden!

If you’ve got any other questions, or if there’s anything else I can help you with, just let me know. Happy to help!