Peg is hanging on. I heard her clucking today like she'd laid an egg (she hadn't, but it was nice to hear her doing her normal chicken thing). We've been locking her in the dog crate in the garage every night -- still not trusting the coop. She's still looking pretty beat up, but she looks less dead-in-the-eye and less mopey. We're still not sure what we'll do.
Get one additional docile chicken to keep her company through the winter.
Adopt her to the guy with the big flock.
Foster her through the winter with Jenni's chickens -- if they'll accept her.
I guess we'll give it a few more weeks and see how things progress.