I'm new here and found this topic interesting (crab shells as feed) because we just sat and enjoyed a couple dozen. So I find that my new chicken hobby for the coming year can benefit from these shells. Thinking ahead, I decided to rinse and BAKE the spent shells and bulkier claws to remove any residual moisture from the remaining meat and innards thinking this would make for more efficient smashing and freezer storage until I'm ready to pulverize when needed. I baked in oven at 400'f for about an hour. My precious wife did not find this to be the best of my ideas, but eventually the air cleared....literally! I also heavily sprinkled it with my homegrown oregano since it has antibacterial properties. They easily crushed after baking. I plan to get a Goodwill blender and further grind to a grit. I avoided the remaining guts. This would probably have been fine but I'll wait until I actual begin with chickens so that it is fresher. This site has been my new obsession, and my precious wife is probably getting overwhelmed with my preoccupation and plans, so I'll share them with you. Any advice is appreciated.