do it slowly, let him run around with the older chickens while your watching him. but wait until he gets to almost the same size as your smallest hen then he won't get picked on as bad. then slowly work your way from watching him full time to let him in there while you do yard work to full time coop chicken. that is a barred rock correct, Elmo is also very handsome, my cookoo maran's comb is all bloodyfrom fighting with my neighbors rooster (who is much bigger by the way). Great pictures too.
