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Yes, in fact TODAY was the first day my hen's gone back to laying a nice normal brown egg again! Since mid-March she's been laying these strange white and very light eggshells, that are very rough & dry-- then, sometimes a soft-shelled egg, and sometimes an eggshell with truckloads of calcium deposits, especially on the pointy end. I've been chalking it up to oviduct or shell-gland maintenance.
About your hen, if her pale shells turn into thin or soft shelled eggs, remove most of her treats and make sure she's got well-flaked crushed oyster shell available always, as a supplement to her layer feed.