A bit of a sad day around here. We have had our chickens for just over a year. Sisters, RIR hatcheries all raised together. My Snoop lately has just been WAY too loud. She molted in some lighter feathers a couple months ago and has since become our transvestite. I swear she thinks she is a rooster. She squawks at the top of her lungs every morning for well over an hour. A squawk with every breath. Seriously it sounds like you are torturing a cat! It is the most god-awful sound! My neighbor called me and said her bug lady thought there was a sick bird over here and thought she should check it out. We aren't zoned for chickens and I had them growing up and never remember any chicken screeching the way she does.
We have tried a number of methods and nothing works. She just squawks for no reason. Food, no food, treats, in the coop, out of the coop, free range all day, it doesn't matter. We finally came to the conclusion she either goes to freezer camp or gets rehomed. Other chicken owners in my area are rare, but thankfully the gal who owns the feed store offered to take her.
Prior to the noise problem she was my husband's favorite chicken. She learned to follow him around when he was skimming the pool waiting for him to give her some bugs. She was the most curious, most adventurous, but also the bossiest of the 4. She will be missed for sure. I think hubby even got a little tear in his eye when we bid her farewell.
Marcia, I am so sorry for your loss. I hope you can find a solution. My one chicken leaving the homestead seems miniscule in comparison.