My grown flock numbers five, one australorp, one idaknow, and three ISA browns. I added thirteen chicks about a week ago, they're fully feathered and nearly grown. All went normally (some status play, minor pecking) until about three days in. The three ISA's isolated one of the new roo's, pinned him against the fence and pecked holes in him. We noticed in time to save him. He's isolated with a couple of the new hens. The three ISA's are in solitary confinement. The other two hens had nothing to do with the attack, and are doing fine with the chicks left with them. When should I reintroduce the injured roo and his attendants? His scabs are starting to fall off, but his new feathers are still quilly. Is there anything more I should do with the three bullies? I've read some articles on cannibalism as a learned behavior, should I just send them to freezer camp?