It's best to give a cockerel a chance to gain some size and self confidence before sending him off to live with a new flock. I wait until he's at least 10 weeks old, preferably closer to four months.Random question - I am 90% sure our Australorp is a cockerel (how's that for luck, out of our 3 original supposed pullets! We only got the 4th because I've suspected this one of being a boy since week 2), what is the optimal time to rehome him? Want to do what will be easiest for him as well as the others. They freak out when one of them is missing!