I have 6 of these pullets bought at TSC. After buying 6 bantams, I decided to go back and get 6 larger birds for larger eggs. These were all they had. They were half price and marked pullets. I thought they were going to be mostly white. Some have a few black feathers. No pattern. Then they started getting some gold feathers on their head, neck and chest. I was thinking they might be mixed buff orp. They are about 7 weeks old. Any ideas???