It's funny to see him stay clear of the older ones who aren't nasty since they're only distinguishable by their anklets. Would a cockerel crow if he's not the top chicken.
We recently just moved our 2 11 week cochins and 1 10 wk EE with our 5 laying leghorns. They spent over a week of see no touch, they do free range at the same time though. 2 of the older girls are showing the little ones who's boss. Even though I hate seeing the little ones getting picked on...