For those of you how crush and give egg shells back to your hens, what method do you use? This may sound like an obvious question but I have been using a Westinghouse Mini Chopper and it is a pain in the neck. Every few seconds I have to stop it and release a clod of incompletely chopped shell from one of the blades. Sometimes I shake it and sometimes I have to open it up and push it out before continuing. I feel like the time it takes for this process each time is ridiculous. Is there a better way? I would just give them the oyster shell but we started giving them egg shell first and now they don't like the oyster shell...won't eat it.