Updated photos before you clean her up?
Does the discharge smell yeasty?
I would give her plain fresh water, plain fresh feed. Let her out and roam with her flock. Keep watch on her and monitor her but let her do her chicken thing.
I might be missing something. Let's bring you back to...
If she's rallying, then I'd put her back with the flock and let her chicken.
You realize to stop her from laying she will need to be in darkness (with no light) for 16hrs each day right?
Are you keeping her separated?