Hi, I have 4 RIR sex-links that are 18 months old. They have been VERY happy together for the past year, but suddenly (last 3 days) one hen is mercilessly attacking the omega female almost at random (I say that as I don't see a real pattern for why the attacks are happening...food, water, space, etc.) The attack: the attacker will chase the victim down and almost straddle her, pluck out feathers on her neck and squabble at her quite violently. At one point, the victim was forced to lay on the ground with her head tucked under the wooden frame of their tractor in fear. I am feeling sick about this because these girlies are my pets and I treat them very well. Are they setting up a new pecking order? Not much has changed in terms of food/water availability, weather, treats, etc. They have lots of space and all lay fairly regularly - no one is broody; they have recently been de-wormed. The victim is missing some feathers on her tail because they got burned my a heat lamp in winter by accident...is this suddenly a "weakness" that the attacker doesn't like? The other 2 girls seem fairly neutral about the whole thing, but occaisionally get involved. The attacker and victim used to be best friends. Should I separate or isolate any of them? Any help/suggestions are appreciated.