I love answering questions. My dark blue lady has many feathers on her feet. The lighter one has 1 on each foot. They never had a Cuckoo pattern but if they are out in the sun, and it shines just right, you can see it like a shadow in their feathers. As for chocolate eggs, not even close. One is...
I have two Blue Cuckoo Marans from Meyers and a Blue Andalusian. The two Cuckoos are different in color, size and comb. One looks almost identical to the Blue Andalusian except for the Andalusians large comb. I can post photos if you are interested.