This chicken looked just like all the other meat birds(Pioneers/Dixie Rainbows) until she(I also do not know the true gender of it and just call it a she) was a couple of weeks old and started to turn whitish. She is also the only one to have gray colored legs. At 4 weeks old she was still the same size as some of the other birds. At 8 weeks old, she is now about half the size as our smaller birds. Our meat birds are ranging from 2.5 to 4 lbs. I've tried to find out her(?) breed by googling but that hasn't worked. Any help is greatly appreciated. Thanks!