My guess is they aren't laying yet, but hard to know for sure since they free range.
As far as calcium on the side, best to not mix in the eggshells and instead have them (plus oyster shell, as eggshell alone cannot provide enough calcium) on the side so birds that need it can take it as needed.
As far as calcium on the side, best to not mix in the eggshells and instead have them (plus oyster shell, as eggshell alone cannot provide enough calcium) on the side so birds that need it can take it as needed.