Looking at the edges of the "hard" feathers, I have to say they look a bit worn. They may be due for a molt. Molting is somewhat individual, and every chicken has its own pattern of feather loss/regrow. Around here (Missouri) this is the time of year for molting.
I have several Ameraucana hens in molt now, and they look awful. But it's a normal process...those feathers get a lot of wear, and they don't last forever!
As they grow those new feathers, remember to provide extra protein. ChickenChick has an excellent article on molting:
https://the-chicken-chick.com/molting-what-is-it-and-how-to-help/
I would post photos of my girls in molt, but it's really hard to to ChickenChick's molting frizzles pictures!
Jen Pitino's article about molting is very good, too:
https://backyardpoultry.iamcountryside.com/feed-health/why-and-when-do-chickens-molt/
Looking at the edges of the "hard" feathers, I have to say they look a bit worn. They may be due for a molt. Molting is somewhat individual, and every chicken has its own pattern of feather loss/regrow. Around here (Missouri) this is the time of year for molting.
I’m wondering if the abnormally high heat is driving them to molt earlier! They are almost five years old and normally wait until closer to the fall.