I need any info on feeding them back the dried egg shells i can get. Is is good for them? How do I prepare them? Do they still need oyster shell? Bad? Good?
If they're fresh just smash them up and throw them back. If not, bake at 350 for 10 min.to dry them out and smash them and put in feed. Sometimes, I use a coffee grinder for the dry ones. It's good for them.
Unless your feeding lots of egg shells I'd still leave oyster shell out. It's cheap and you can make sure they have calcium 24/7 for whenever they feel they need it. I don't bother baking my egg shells. I just throw them in a bowl as I crack eggs. When the bowl is full and the last eggs have dried a little while I smash them all up into pieces and throw them to the chickens.
I give my chickens egg shells too. But I usually mix with their foods....more like with their treat! Mix with Yogurt, Banana, Oatmeal, anything they like. They eat more egg shells with this way. And I'm still giving them Oyster shells too.
I do that. I rinse the egg shells then microwave them for about 2 or 3 min. It makes the shells very easy to crush up into little pieces, and kills any bacteria.
I toss the shells in a bucket on the counter- and when I remember, I whack them into smaller pieces and throw the out with a bit of scratch and/or vegetable peelings. No drying at all. I've been doing it for 16 years, and have never had a problem.
I just toss my used egg shells into the treat bucket and the next time I take treats out, out go the shells. I don't bother doing anything else to them. The chickens never had a problem taking them out of the compost pile as is.