It reminds me of two chicken noises I've heard before.
The first is the noise made by my neighbours hen when she's trying to crow like a rooster, but that involves standing up and, well, trying to crow with lungs full and head back. I can hear her right now, "crowing" up the street.
The second was the squeal made by Sandy when Mary sat on her, grabbed her comb and twisted it. (Thankfully a one-of occurrence as far as I'm aware.) There were little black specks on Sandy's comb afterwards, which I was told were dried blood specks.
Do any of your hens have dark specks on their comb?
But Lavender & Patricia were having @ it so maybe someone got hurt. 
Lottie grabbed her corner & was all settled & sleepy before anyone else arrived. That was Soda & Hepzibah who prowled the top roost prepared to ward off all boarders!
Lavender was allowed up. Tuppence was not. Lavender screamed @ everyone ~ it was her the other night. Luna had no trouble & after a bit of fuss Suyin was allowed up. Ha'penny wan't. Patricia definitely wasn't. I actually intervened for Tuppence because She & Lottie & Ha'penny usually squeeze up together. Ha'penny is pretty stubborn & having run the gauntlet of assorted pecks took her opportunity & squeezed in between Soda & Hepzibah. Patricia eventually managed to get up between Luna & Suyin. Lots of pecking & squawking. They were still @ it when I left the coop but no~one was actually getting pushed off. I dunno. They're mad.
we have a few more pictures for you from yesterday 
had a great day out and about before grocery shopping.
