Egg shells would be a part of it but would not likely supply their entire calcium needs alone. (I have read it takes 2 1/2 egg shells to give a chicken enough calcium to make 1 egg.) In addition to the egg shells, it would be good to provide forage that would make up for the rest of their calcium needs. Most people don't think of veggies providing calcium, but there are some that are very rich in it. Some calcium rich veggies are okra, collard greens, kale, mustard greens, dandelion greens, turnip greens, watercress, beet greens etc.Oh my gosh, I love this thread! All the OT information has been wonderful. I decided to switch my laying hens to grower, and offer oyster shells. But here's a question: if suddenly commercial stuff like that wasn't available, how would our girls get their calcium - from eggs shells?
I heard little uno chirping in his shell!!!! So cute! No pip yet, but I'm so excited!!!!

They are decent sized eggs. Sometimes. LOL. Sometimes I get small ones...but they are usually large eggs. I have one Commercial Black girl that lays gigantic eggs...not every day, usually every 3 days...those whoppers are usually double yolkers. Once I got a triple yolker!
My son holding a double on the left, triple on the right:
The triple yolker
Double yolker on left, triple on right:
Normal egg on left, triple on right:
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