Cockadoodle-doo.
Roosters crow due to a biological signal which sends signals to the brain. It is the same type of signal that helps a human body return to a normal temperature 1 hour before waking...
You can't stop 'em from crowing, but you can muffle the noise (between certain hours) by keeping them inside your house (in cages!) or in a sound-boarded chicken house. Location of the roost is also...
he may for a second but theyre not dogs . roosters are gonna crow and that's that BUT you can make him quieter alittle longer in the morning. just keep it dark in his home longer. however im talking...