X2So she's about 3 months old now? She's not a black copper marans. She looks to be birchen in color, and also it looks as though she may have a rose comb, so I don't think she's a marans at all.
I'm saying she here just to be able to use a pronoun, I'm not sure that she's a pullet from these pictures. A comb picture would help as would closer up pictures.