cold nights

[Frida's mom]

One of my BRs refuses to sleep in the coop and instead perches in the run. We're having night temp in the teens. What to do?? I've tried moving her in the dark with no luck.

 

[Mrs.Puff]

Keep moving her after dark, block the exit so she cannot go back out in the run until you let her out in the AM, and you can also take down the "perch" she is sitting on in the run. Maybe that will help.
Try to determine why she won't roost with the others.