Yes. There are feathers in their run/coop. I'm unsure as to what's considered "usual" though.Are you seeing feathers in the yard/run/coop?
Her hatch date was likely late April to late May-ish. Perhaps right timing for a molt?I see a lot of new pin feathers. My pullets, who hatched 3/8/22, hardly molted--a few not at all, and two lost about 5-10 feathers each. Not the full molt, due to their spring-time hatch.
The others don't look any different, just her. I sure hope it's not mites or lice.

Have you checked her over for lice or mite's?