White spots on brown eggs

[Brwrboyz1]

I truly enjoy all the shared input in this community for chickens. It has helped us immensely since we started our journey from eggs to egg layers.
Today we received a surprise. Our first egg. We do not know who laid it as it was in the coope walkway not a nesting box. We now put in the fake eggs inside the nesting boxes to help our girls know where to go.
My concern is the calcium spots. They all appear healthy. Eat every day. We change their water. Still on grower food as we did not think they wouldnt start laying until the end of this month or next. Should I worry about the spots on our first eggs? Is there any way to pin point whose it is? We have a variety of girls. One Asian Black and one Golden Comet (both around 18 weeks), one Mottled Houdan, one Silkie and one White Polish (around 15 weeks) and one EE (around 14 weeks). We know its not the EE.

 

[aart]

Should I worry about the spots on our first eggs?

Nope....not unless it continues on every egg, then maybe revisit.
Are the white patches crusty and hard or not?

Is there any way to pin point whose it is?

This'll get you close,
https://www.backyardchickens.com/articles/who-is-laying-and-who-is-not-butt-check.73309/
but you may need to catch her 'in the act' to be absolutely sure


'Speckled' eggs can happen for several different reasons...very few, if any, of which are a 'problem'.
Can be caused by:
Excess or uneven pigment coating.
Excess or uneven cuticle(bloom).
Excess calcium deposits.
Porous eggs can appear speckled.
Some birds lay them consistently, some only once in awhile.
The pigment or bloom can change appearance when wet, then change back when dry again.

As long as bird is getting a good diet and is healthy in every other way, it is no cause for concern.

 

[Brwrboyz1]

Nope....not unless it continues on every egg, then maybe revisit.
Are the white patches crusty and hard or not?

They are "hard" and can be scratched off with my nail. Egg is VERY firm which I thought may be odd as it is the first egg and we are not giving them the addl calcium for the layers.

 

[aart]

They are "hard" and can be scratched off with my nail. Egg is VERY firm which I thought may be odd as it is the first egg and we are not giving them the addl calcium for the layers.

Probably just a 'start up' glitch.