i have 26 buff orpingtons, 12 of whom are destined for the freezer before fall. (we actually have 13 males, but we're keeping one to keep the ladies company and have babies next year.) they are 10 weeks old right now. how many weeks old before i should think about butchering them? i know i need to wait longer than if i had a meat specific breed, but beyond that, i don't know. i'd like to have them in the freezer by early august, which will make them 18 - 20 weeks old. but i don't want to wait too long, either. advice?