I have two blue copper Marans I purchased from a local breeder on August 10. At that point, they were 6-8 weeks old, meaning now they would be 10-12 or so. They are both about the same size, but one of them has developed more copper colored feathers on the neck than the other. I don't know if this is just a case of one developing faster than the other, or if one of them is a cockeral. Any help would be greatly appreciated as this is the first time I have had this breed.