I don't microwave them. Microwaves mean radiation, and radiation is unhealthful. I let the egg shells dry naturally in a bowl reserved for drying eggshells. Then I crush them and mix them into the chickens' feed.
I was wondering today, is it okay to give crushed-up duck egg shells to chickens? As in, is it safe? Duck egg shells are harder to break than chicken egg shells, so if I feed that to them, will it make their eggs that they lay have stronger shells? I was planning on doing an experiment once they are out of the "first few eggs are unusual" stage, but if you can advise me, please do.
I was wondering today, is it okay to give crushed-up duck egg shells to chickens? As in, is it safe? Duck egg shells are harder to break than chicken egg shells, so if I feed that to them, will it make their eggs that they lay have stronger shells? I was planning on doing an experiment once they are out of the "first few eggs are unusual" stage, but if you can advise me, please do.