So first time chicken owner and first post. We got 6 chicks from tractor supply. Had to call back to ask which breed they were as we are new to this. Two were Rhode Island reds. Two were an Asian black breed and the two pale yellows they did not know what they were. All are growing healthy except one that I believe is a meat breed or rooster. Feather are coming in white and is twice the size as the other hens. It has a hard time walking due to its size and a large mass between its legs and tail. Feet and legs are also much larger than the other girls. Only two weeks old. Any ideas on what it is?