I've got 10 hens that are just turning 5 months old. 4 of them have recently started laying. The problem is that over the last couple of weeks my two RIR's and to a slightly lesser extent my two Barred Rocks have started terrorizing the other chickens. They chase them around and pluck feathers from their butts and then eat them. It is driving me crazy. Is this normal? Is it somehow connected to when they start laying? I don't think it is a cannibalism problem yet but i am scared it will become one. We tend to feed them treats daily of lettuce and melon rinds and such. Are they eating too much of that and not enough feed and thus becoming protein deprived? Also we have no rooster. Not sure if that makes a difference. Any help will be greatly appreciated. It kills me to see my precious hens treated this way.