Mi new ones are about 4 weeks. I sit in the coop to watch chicken TV and bring treats. They have started to peck at my ankles/feet, I assume to get me to give a treat. One peck drew a tiny drop of blood the other day. It didn't take long for several to start going for that blood. I've read about pecking/cannibalism here but never had a problem, so far (I also have an older flock.) I was amazed at how quickly the behavior started.
I got out of there.
I got out of there.