Is this the beginning of the next feather stage in 9/10ish week old?

[CatsandCrops]

I'm probably being overly worried, but wanted to check in to see if this is normal or not - one of my barred rock hens is all "fluffed out" around her bottom and has been all day today. No one else is like this nor have I seen them like this previously. They are roughly 9 to 10 weeks old. We got them at "2 days old" but we believe they were closer to a week. They have access to a predator protected run all day where they forage around for bugs, grass etc, have open access to water/feed 24/7. Is this just the beginning of the next stage of feathers? Should I be worried? #firsttimemomma #overlyprotective

 

[aart]

Is this just the beginning of the next stage of feathers?

Could be.
Look closely and see if the fluffy stuff is old feathers stuck to the ends of new ones.
Also look for other pin feathers growing in.