I am new to raising chickens and I am curious is anyone can tell this early if one is a roo. We have 2 Orpingtons and 2 light Brahmas. The light Brahma that was the smallest and took the longest to feather out now is the largest and looking a bit different than the other Brahma. I noticed the feathers on the neck look finer and the comb is more pronounced than the others. In the first pic the one in question is in the back. Second pic is a closer look.