I bought 20 chicks that hatched out Christmas day. I have 8-9 little roosters in the bunch. I live a few blocks from city hall and the police station in our little town and have a small lot with close neighbors. Even though I hear a couple of roosters crowing in the neighborhood, I just don't want to draw attention to my flock. The lady I bought the chicks from has a mixed flock and uses 3 RIR roosters. So they are at least half RIR. How old are they when they start to crow and will I have time to let them grow out and "fatten" up before I butcher them? They already challenge and spar with each other. They think they are so bad! Thanks for the help.