Hi there!Do their eggs get darker over time, or was I mis-led as to the breed? Physically, she looks like a CM.

I bred Marans for a few years... French Black Copper. First eggs are not considered an accurate representation of their true productive shade and should be about leveled out by egg #20.
Clean legged cuckoo Marans I see all over the place are indeed mostly hatchery birds and also do not *usually* lay dark eggs.
Despite that person having other breeding pairs... wouldn't surprise me, as I see folks order from hatcheries and sell off the extras... my very own friend assumed was a breeder but NO.
I do separate my cockerels and pullets by a specific age... but I still also have a whole pen full of just cockerels the same age as the pullets. Were there extra stags somewhere? If not that's a great indicator of hatchery birds... sexed as pullets.
Despite having separate and secure pens for my breeds, I have had an accidental escape/mating... producing cross breeds that looked VERY close to their original parent and only with huge amounts of discernment was I able to determine it had happened.

The sire's input to the egg shade is key. Improve darkness by adding males from dark egg lines.
Post pics of your ladies!
