My 10 month old Silkie roo does not act like a roo at all! He has never crowed and he doesn't try to mate with the hens. (We had a rooster his age that did this frequently, so that's what made me realize that our Silkie never did.) He is really sweet and is perfectly healthy, so I don't' know what this means. Also, he's not the top chicken. He's located about in the middle of our pecking order. Does this have something to do with it?