Got 3 barred rocks yesterday, they are 18 weeks and mean little birds, lol. The other five RI hybrids are being pecked on the heads by these three new hens. Can't tell for sure yet if it's just one bully, but they aren't afraid of the others. Also they don't appear to know how to go into the coop at dark or sleep on roosts yet. Will that change with in time? And will the different birds eventually huddle together or always stay in their own "cliches"?