I am going to be switching all my chickens over to flock raiser when my new chicks become integrated, and I have been told that I should also then offer oyster shells on the side for my layers.
First of all, do I need to make these inaccessible to the younger chickens?
And also, is there something I could give them instead of oyster shells, like their own eggs shells, or otherwise?
And P.S. Is this still a necessary addition for free ranging birds?