Really, I don't know enough about black Orps to know if they can have a touch of leakage. They "shouldn't" have any, to be a quality bird. Black is a newer color to be available of that breed, so the quality may be off.
Or, she may be a mixed breed bird, with some Orpington background. That's a likely thing, also. The white skin is dominant, so she could easily be mixed. Her large rounded, fluffy body shape just screams Orpington, though.
The white bird---how old is she? Where did she come from? She looks to me like a Cornish cross, the traditional meat bird. They're not known for living long and healthy lives. Is she having any problems getting around, things like that?
Or, she may be a mixed breed bird, with some Orpington background. That's a likely thing, also. The white skin is dominant, so she could easily be mixed. Her large rounded, fluffy body shape just screams Orpington, though.
The white bird---how old is she? Where did she come from? She looks to me like a Cornish cross, the traditional meat bird. They're not known for living long and healthy lives. Is she having any problems getting around, things like that?