Oyster shell isn't easily digested by some hens. The result can be thin shells regardless of how much oyster shell is available. Another reason oyster shell may be inadequate is if is reduced to very small partlcles and powder. Replace it if you find it's in this condition. The particles need to be of size to remain in the digestive tract long enough to absorb.
Lack of sun can also cause shell issues due low vitamin D. Add D3 to their water when the weather is dark or they have to stay inside.
But you can give these other hens calcium citrate and D3 when their shells are thin. A few days of the tablets and it usually fixes the problem.
Lack of sun can also cause shell issues due low vitamin D. Add D3 to their water when the weather is dark or they have to stay inside.
But you can give these other hens calcium citrate and D3 when their shells are thin. A few days of the tablets and it usually fixes the problem.