we dont mean to pick on you hun-but your 21 week olds are not chicks anymore they are full grown chickens -well not full grown but old enough to mate and lay eggs for some breeds-sometimes questions that get asked come across so funny we can't help pick on or make fun of the question-even though I have a bizzillion posts I still get ripped on out of fun and love-and the depserate need of education on topics I dont understand...oh by the way they will never stop mating again until you either get rid of all roosters or seperate them away from females.