@SMorrison7k that is exactly how this one broody is - broke a few days and next thing you know she's melted into a nest! CRAZY
About your barebacked girls. First is this the roo doing it when he mates and treadles her back? I think probably so. The only way I know to save their backs is to get hen saddles. Sometimes called aprons. I've been working on a way to make them useful for use in the summer. Most mesh won't stand up to the roo's treadling.
Second thought is the heat. I know my girls become snarky when its really hot like we've had for too many days in a row. They don't peck but they are snip, snip, snip at each other. Cooler in the am and the later evening and the snarky goes away. I know I'm a mean girl when I get too dang hot for too long!!
I just put the last of my ice out! DANG that went fast. I put the bottles out earlier. Its 112 here. No fan will help with 112 degrees. The younger NN girls immediately began standing right on the ice - those babies are hot, hot, hot. This is their first summer heat and I'm sure they are thinking WTH! The big girls are hot too - added ice to their puddle.