I got 2 new POLs at the beginning of April (Hetty and Bumble) and slowly introduced them to my existing 3 years old girl (Red). The bolder of the two new hens Bumble, resigns herself to sleeping outside, so every night i put her in the coop myself. Tonight, a good three weeks on, I watched Red attack Bumble's neck by clamping her beak onto her neck. I've watched the usual 'pecking' order behaviour in the day time which doesn't concern me, but this seemed a little more. I haven't seen any blood, but it's obviously causing Bumble (and me) distress. Any tips/ ideas to ease the situation? Hetty doesn't seem to have any issues, and quietly goes to bed unfazed.