They all will eventually crow just be patient. Just dont allow too high of a ratio of roosters to hens. Good rule to follow 1 rooster to 7 to 10 or more hens; more hens the better. If you allow to many roosters to exist the hens will suffer terribly not only will egg production decrease, but the hens will be ripped up on their backs from roosters. Not a good thing I know first hand our hens are still trying to feather back after several months.