What are these spots on my eggs?

[mhowardvt]

I see these spots/discoloration on the shells of the eggs some of my hens lay. It almost looks like a stain or maybe just a thin part of the egg. It’s not dirt on the outside of the egg, because dirt stain looks different to me. Could be cracking from inside the egg? My main question is: Are they okay to eat?

 

[Chickassan]

They're fine to eat, no idea what causes that though. They pop up here from time to time.

 

[EggSighted4Life]

They are fine to eat. What's odd is it is on all of them. Makes me think it might be where hay was touching while the bloom was still wet??

ETA: Welcome to BYC!

 

[pennyJo1960]

Welcome to Backyard Chickens do you use straw in the nest boxes ? have to agree with eggsighted

 

[mhowardvt]

Welcome to Backyard Chickens do you use straw in the nest boxes ? have to agree with eggsighted

Thanks! Helpful. I like to use a combo of shavings and hay...but some of the girls are digging up a little spot in the corner of the coop and laying there on the ground which is where I find these ones. Sounds like that must be part of it.

 

[pennyJo1960]

I use straight white shavings that is all

 

[aart]

Thanks! Helpful. I like to use a combo of shavings and hay...but some of the girls are digging up a little spot in the corner of the coop and laying there on the ground which is where I find these ones. Sounds like that must be part of it.

Could it be damp there?
I get nest straw stuck to wet bloom all the time, it rarely leaves a mark like that.

 

[FarmBoy25]

Should be okay to eat, hens lay an odd egg every now and then, but rarely so that its all of them.Check the other ideas and have a great day.

 

[50-45-1]

I get one that looks like that every once in a while.
They are good to eat.
I use them myself as they just do not look right to include with what i sell.
I notice when i break mine that the shell seems thinner. Like one of my girls needs more calcium. I have oyster shell avaliable always.
Are all of your eggs like that?

 

[AmaranthineAcres]

I have noticed something similar develop over time as my unwashed eggs sit on the counter. Never had any problem eating them but I do refrigerate them when it starts to show up, just because I get paranoid.