I know that oyster shell is a good source, but what are some other good sources of Calcium to feed layers ?
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What is the size of your grind up shells? What type grinder do you use? I understand it is important to have various size so the absorption of calcium I staggered!I always grind up their shells so they barely resemble shells (so they don't get any egg eating ideas) and it works great. I leave it in a seperate container that they can freely eat from. If you can grow alfalfa, it helps them retain a lot more calcium.