PSA: oyster shells in a separate dish do nothing if the feed already has calcium in it

Nancy Morgan · 2026-10-26T00:00:05.503862+00:00

I spent $14 on a bag of oyster shell at the feed store in Boise last month and my three hens ignored it completely, because their layer crumble was already at 4% calcium and they were getting plenty. If your eggshells are thin, check the feed label first, since I spent six weeks blaming the wrong thing, so what's actually in your crumble?

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PSA: oyster shells in a separate dish do nothing if the feed already has calcium in it | Backyard Chickens - The Community Guide