Maybe not so bad. Did they look worse for wear when you put them in the coop? If they can get away while free ranging they should have been alright. Without a introductory period, the pecking can get intense when they are confined to the small space of a coop and run. When they can get away in a larger space, free ranging, it does lessen. If they were not bloodied and survived the day, at this point I would be tempted to let them work it out while free ranging. Of course watch when you can. It can take time for them to accept the newbies.