Are you mixing the oystershell in the feed yourself or does the ingredient label list it as an ingredient?So my girls have feed with Oystershell in it and extra Oystershell on the side for free ranging but their shells still are very thin and every once in a while soft they have been laying regular for 4 months what would you do?
Never mix anything with the feed or you'll be throwing off the balance of nutrients.
Thin egg shells aren't always due to a deficiency of calcium. Frequently it is from an imbalance of phosphorus to calcium. A vitamin D3 deficiency can also be suspect.
Salinity in the water, old hens, heat stress or mycotoxins (mold) can cause it as well.
No shells, among other things can also be from an imbalance of calcium, phosphorus, manganese and vitamin D3.
Inadequate D3 prevents absorption of calcium.
Excessive intake of either calcium or phosphorus inhibits the absorption of both.
I would go back to the basics. No scratch or treats. Just a complete layer feed with the oyster shell on the side.
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