Being a first time chicken owner, fining my first egg was exciting My amberlink was setting on a beautiful dark brown egg. This was yesterday morning. Today I found three eggs....in pic. I have one amberlink, one red cross and one barred rock that are all the same age. Do these three lay the same shade brown egg? Are all three of them laying or are all these eggs from the same chicken?
Chances are all 3 birds are laying...not likely that 1 bird laid 3 hard shelled eggs in one day.
This might help..... https://www.backyardchickens.com/articles/who-is-laying-and-who-is-not-butt-check.73309/
....but you may have to 'catch them in the act' to be sure who is lay which egg.
There may be subtle differences you'll learn to differentiate, or not.