I had Copper Maran rooster, EE rooster, also a Rhode island red rooster. The hens were EE, Australorp, Rhode island red, Delaware. Any thoughts? hatched out around 25 of these. All are 3 weeks old.
They'll look like mixes of their parents. Mutts often change a lot from chick to adult bird. You never know what they'll look like based on their chick fluff.
Does your Marans have feathered legs? If so, feathered legs are a dominant trait and all his offspring will have them. Sometimes it's only a feather or two, but they'll be there.
Yes I have probably 35 with feathered legs and around 20 looked like pure maran from the copper maran rooster and maran hen. I'll post some pics of them soon. Have a bunch that are black with reddish brown feathers coming into their wings, so I was guessing they are Copper Maran and Rhode hen cross.