I'm a first time chicken owner and just recently bought my first flock. I have noticed that one in particular has looked different from the rest of the chicks since the beginning. I originally assumed that it was a roo, but now that "he" is a week old he is starting to look more like a she. Originally he had definite bars and a lot of white, but now that the feathers are coming in he is changing! Hope you all can help me out!