Hi I'm new to this and kinda bought 30 chickens at a local hardware store on a whim. only regret was that I wasn't sure what i was buying so after i got home with the golden comets and asst. bantams i did a lil research and i have 12 comet roosters and 6 Bantam roosters what age should i wait to put some of the roosters on the grill and is it worth the time and effert to butcher the bantams? they are about10 weeks old now