What is with these eggs?

[sn0wwhite]

My EE was laying these blue-ish eggs and they've started becoming speckled and kind of bumpy. All the other chicken's eggs are fine. Is something wrong with her?

 

[jeds chickens]

I think the bumps are from a calcium overdose. I don't think there is a problem.

 

[sn0wwhite]

I was wondering if it was calcium. I don't add any oyster shells or anything, but they all have sturdy shells.

 

[Crysta]

I've read that stress from weather can cause speckles in egg color, for instance if it is too cold (which you might experiencing) the pigment may distribute unevenly.

 

[sn0wwhite]

Ah! Interesting because I AM in Minnesota.