I saw this yesterday on the French Marans Club website but I thought it would not do me much good. I cannot read French. I do like your egg chart better than mine. Looks like my Cuckoos are laying a 2 on your chart.
if your cuckoos are laying a number 2 than they are not marans .
minimum 4 to be able to be called marans and able to breed from .
shame god know what they added to them .
chooks man