I know that feeding your hens' eggshells back to your hens is a good way to give them calcium, therefore keeping their eggshells hard. My question is, how do you go about storing your eggshells until it is time to give them to the chickens? Do you grind up the egg shells and give them as you go, or do you wait till you have a significant amount, and then give them to them? I like to wait till I have a good amount, then grind them up and give them to the girls. It's also much easier to grind them up once they have dried out. My concern is, is it possible that leaving the wet eggshells out to dry allow bacteria to grow, hence making my chickens ill? I could rinse them off before drying them out, but I don't think that would get all the yolk off, unless I used super hot water. Thanks!