Agrophobic chicken?

[loustu]

When I open the door to the chix in the morning, they all scurry out but 1 who insists on staying on her roost. She is not laying either. Sometimes I pick her up, plonk her outside and shut the door but she hardly moves from the door.
Any tips?
Thanks

[newtohens]

She may be bullied by the others. I have a pullet who is not keen to leave the house. She will, given time.