From the pictures, Mochi definitely looks like a girl to me!
This morning, as I was walking down to the coop to the let the chickens out, I heard crowing. I almost died of horror. I raced down there and pulled open the door, ready to confront Mochi, but she came walking out like nothing happened and began to feast on food. Then another crow came from inside the coop, I was terribly confused because all of my little ones had left the coop, which left my older hens, who I knew were female. I guess one of them was feeling extra bossy today or something.