She should be with her flock, so unless you see her being picked on, I would say yes.
She will leave the box to eat and drink, it sounds like she trying out being broody. Let her do her chicken thing, if she stays in the box for a couple days, put some eggs under her and start making plans for...
Generally, it’s good to have a separate area for broodys. She will leave the nest to eat and drink and poop. They are very focused while broody and will stay on the nest, for the most part.
Skittish chickens are certainly a challenge when it comes to healthcare 🤣
They do take breaks from laying, as well. Just keep an eye on her, are her wings droopy?
I have three ee’s, and two of them have always had calcium deficiency issues. They normally lay daily, but haven’t been the last couple of weeks. I’m convinced it’s the uptick in the temperature, getting up to 100.
Can you feel anything between her legs that would indicate being eggbound? Could...