Why does my cochin frizzle suddenly stay outside (in the freezing temperatures)?

[Sciencediva]

My little frizzle bantam chochin has decided over the last few days that she wants to sleep and perch in the covered run (which is safe from predators) instead of going with everybody else into the hen house. This has never really been an issue before and is rather bizarre behavior considering the last few days and nights have been very cold (teens and twenties).

I have moved her inside myself each evening because I worry she will be too cold during the night.

Suggestions?

 

[Granny Hatchet]

i have seen this same thing this year and our temps are way below average so keeping an eye on them while freezing my tail end off, i noticed there were another hen picking on her.or a roo if she is just getting ready to lay?