That's good. But some individual hens have trouble absorbing calcium without an extra boost. If it were my hen I would have oyster shell available for those who might need extra (those that do will help themselves others will ignore it), and for this particular hen, I would give her a Calcium Citrate + D3 tablet every day for a week. These are available at any grocery or pharmacy in the vitamin/ supplement section. Just pop one into her beak after she goes to roost every evening, it may look big but she can swallow it no problem.