Broody Hen with Featherless Stomach

[Duckstruck]

Hello!
I've noticed one of my Jersey Giants has become broody, and spends a lot of her time in the nesting boxes. I didn't notice this yesterday, and I did collect eggs from underneath her before, but when I did today she didn't feel right. I pulled her out and flipped her on her back to reveal a naked stomach! It's featherless, and is such a large patch I'm really surprised I didn't see/feel it earlier. My first instinct was to check her for mites, but I didn't see any obvious things on her skin. I have a video I can post later to show y'all what I mean, but it's so weird...
Her skin looks healthy, it's not discolored or flaky. Do broody hens pull their feathers out? I looked around in her nest and didn't see them there.
Thanks!

 

[HuskerHens18]

Yes, broody hens pluck out their stomach feathers to keep the eggs warmer

 

[ChickNanny13]

2x She's a normal Broody ...

 

[The Phantom]

Mine does the same

 

[chickens really]

They pluck out the feathers to line the nest for the up coming Chicks.....

 

[Mtignor]

Yes, broody hens pluck out their stomach feathers to keep the eggs warmer

Will their abdomen feel larger also? I have another I just drained so I may be pretty paranoid. All the others feel pretty small like tennis ball size. This broody one feels like a large softball

 

[The Birb King]

That's normal. Broody hens will pluck out their chest feathers to have skin contact with the eggs and control the temperature better.