Quote: Any feed store has it. Put it in a bowl - in the run. This way you can "monitor" how much that they are eating and can make sure they always have it available. Noit only do I do oyster shells, but I bake my egg shells and then crush them up and give them to the birdies.
Right now my girls have access to 18% starter/grower feed, water, and grit. And they free-range most of the day in the half acre backyard. When do I need to start providing oyster shell and/or egg shells? I had heard it's good to put it out with the first egg.
Hopefully someone else pipes up on this....I usually start giving it to mine about the time they are starting to lay. Probably because I don't remember until then.