aww... what a cutie, those grey areas will turn a rich chocolate colour in the colder weather.  like my bunnikins.  You sure it is a he?  In one of the pics he looks like he might have a nap under his chin, which is what females have to store fat when they are pregnant. (or overfed) Then again, it could just be the angle of the pic.  I love chicken, he is adorable!!!