The classic "annoying little sister!" The bigger girls are feathered out enough that they don't need the heater, but your little one is still all downy, so she does. Still, she wants (and needs) the company, so she tries to snuggle in with the "big girls" ... who don't want any parts of it!
I...
Do NOT leave her alone in the brooder! That's just asking for more issues. The first is that she'll continue chirping for company, and the added stress of not being able to see or hear other peeps will put an added stress on her already taxed system.
The second issue - and it's a big one - is...
Herman is a very funny rooster! There is more about Herman and his Mompom in his article. If you have a few minutes, you'll probably get a smile out of it ...
https://www.backyardchickens.com/articles/is-there-a-rooster-in-the-house.74089/
A feather duster can work, but we had a lot of luck with a large pompom.
We raised a lone Silkie, who was seriously stressed about his predicament. The one thing that finally settled him down was an extra large, extra furry backpack decoration we call his Mompom. The pompom started out about a...