Paperthin shells

[ajackalope]

One of my older girls has started laying eggs with paper thin shells. Not shelless or rubbery just really thin. I know its one of the older girls 4-6 years because of the size of the egg but I don't know which one. They get layer feed and free choice calcium and they all look good. Is there anything else I can do?

 

[aart]

Not really, unless you can find out which bird.
Do they eat the OS?
Might try sprinkling it out on the ground.
What breeds do you have?

 

[rosemarythyme]

Older hens don't process calcium as well as younger birds I believe, so even with layer feed and assuming she's eating oyster shells regularly, she might not have great quality shells no matter what you try.