I am totally flummoxed by the behaviour of my flock, I have no idea who is head hen or if there even is one!
Pedro is submissive to Lilah only, and wouldn't dare even think about challenging her in any way at all.
Jellybean is submissive to both Lilah and Pedro and she also wouldn't dare even think about challenging Lilah nor Pedro for that matter.
Roo is submissive to Pedro and Jellybean and she too wouldn't dare even think about challenging either of them, but yet Lilah is submissive to Roo and wouldn't dare challenge Roo

Lilah has always been lenient on Roo, allowing Roo to steal food from her very mouth, always when Roo wanted something of Lilah's i.e. treat or Lilah's chosen dirt bathing spot, Lilah would step aside and let her have it, however, Roo has now taken that too far and will peck Lilah hard. Poor Lilah barely gets a minute to herself, Roo is constantly shoving Lilah around, and sticks to Lilah like glue, Poor Lilah can't even eat anything without Roo sticking her big head in the way and the uses her body to shove Lilah out the way. A few days ago the four were dirt bathing, Pedro and Jellybean chased Roo off for a bit to begin with but they soon settled down and got on with bathing, we noticed Roo moving closer and closer to Lilah until she was practically laying on top of Lilah and then Roo turned on Lilah and pecked Lilah hard in the face, Lilah didn't retaliate and moved over but Roo moved too and kept it up until Lilah had enough and walked off. Now Roo's attacks on Lilah are becoming more frequent and more violent too, what started as just one peck has turned into Roo repeatedly pecking Lilah and to the point that Lilah cries out in pain.
This evening, due to the high winds I had the girls in the run for their last hour or so before bed, I sat in with them as it was after dark. Pedro and Jellybean were eating off one of the veg trays at front of run, Lilah pecks them out of the way and takes over that tray, they both go off to another and Roo was standing near me, she saw Lilah eating so went over, shoved Lilah out the way then stood in the middle of the tray so Lilah couldn't get any, Lilah moved away and started eating out of one of the grit mix bowls, Roo came over and took over that too (this is what Roo does constantly throughout the day also).
Shortly after, Jellybean had finished where she was, went over to one of the other veg trays, she got pecked by Lilah and so moved away. Pedro went over, she got pecked by Lilah too so she also moved away, both went onto other things to eat instead. After some time, Jellybean chases Roo who runs over near to me, after a short while Roo runs over to Lilah who is at the front of the run, pushes Lilah out the way yet again, Jellybean attacks Roo, Lilah rushes over and grabs Jellybean off of Roo and pecks Jellybean to get her away from Roo, Roo resumes eating but after shoving Lilah out the way yet again, stands full on the tray so Lilah can't get any so Lilah then comes to eat off the veg tray near me further at the back of the run. Pedro and Jellybean lunge at Roo, chasing her away from both front veg trays so Roo comes over to Lilah, repeatedly pecks Lilah violently and takes over her tray and it ends up with Roo shoving and pecking Lilah away, Lilah then goes after Pedro and Jellybean, Pedro goes after Jellybean too and the Jellybean goes after Roo, jumps on Roo's back and violently pecks Roo on the back of the head, neck and comb repeatedly, me not wanting to cause problems by intervening, coughed which caused Jellybean to pause momentarily but long enough for Roo to get away.
Shortly after, Lilah decides to go to bed, Jellybean attacks Roo and Pedro seeing Lilah gone joins in and both pecking, kicking and scratching at Roo at which I did intervene as it was way too much but I did it by averting their attention so hopefully won't cause a set back. It is the first time the two have ganged up on her and attacked her together, usually is one or the other and is mostly Jellybean, although violent the attacks usually only last a few seconds and as long as Roo does as she's told they leave her alone. I am not sure of this but it seems the worse Roo is getting toward Lilah, the worse Jellybean and Pedro are getting toward Roo.
I am at my whits end and don't know what to do, any suggestions?