Lol, maybe they were getting on her nerves so she gave them a few feathers and said "Bok bok!" (chicken talk for "go play") .Well her last batch is 12 weeks old and shows no signs of that issue. She's just really mean. Feather picking isn't usually a bully move. They will just pick the feathers and eat them right there, not flog them, rip out their tail feathers and call their kids to the buffet.
They never did eat the feathers, they just ran around with it and played keep away.