Normal Rooster?

Here is a pic of our rooster, Buck. He is supposed to be an Americana and I think he is around 3-4 months old. We got him a month ago and he grew a lot the first week but has not grown much at all since then and his feathers are barely there, he has a lot of bald spots. Is this normal? Do we have a correct age and breed of him? Will he just look funny for a few months and then suddenly blossom into a beautiful rooster or is there something wrong with him?