Egg Shell Problem

[Artemis Moon]

I'm not sure if this is an issue or not but one of my hens is laying eggs with what looks like small calcium deposits? Is this normal or is she getting too much or not enough of something? She's been doing this for months. I can scratch off some of them but others are fully calcified.

On Purina Layena Crumbles, free range rarely due to a hawk getting 2 of them this winter but slowly letting them out more. And just gave them access to oyster shell.

Any thoughts are greatly appreciated.

 

[redsoxs]

Here's a link to an article about egg abnormalities. Excess calcium like what you are seeing is described. https://www.backyardchickens.com/a/common-egg-quality-problems
Good luck and thanks for joining BYC!