New layer with calcium deposits

[Ajp23]

I have an olive egger who started laying about a month ago. Every single egg has several calcium buildup spots. The entire flock is currently eating Nutrena 18% soy-free, layer feed and also have oyster shells available.

Should I adjust something? Is this a sign of a larger issue? She’s the only one of 17 ladies with this issue currently. Picture of a typical egg below. Thank you!!

 

[Mrs. K]

This is a glitch in her system unaffected by the feed. If it was feed all or more of your birds would be affected. It generally works itself out but may take weeks.

 

[Ridgerunner]

Here is what the Egg Quality Handbook has to say about it.

https://www.thepoultrysite.com/publications/egg-quality-handbook/17/sandpaper-or-rough-shells

This is written more for commercial operations than us backyard keepers so don't read the reasons too closely. Since your others are OK it is not a disease. Almost certainly just a glitch in the shell gland, most of them grow out of it eventually.