It's good that she's perking up.
If she were mine, I would still give the Fish Mox to help prevent infection.
Extra calcium for a few days too.
Getting back with her girls is always good!! Even if they don't feel 100% often they are much happier and more comfortable being with their flock...
Poor girl!
Yes! I would start her on the Fish Mox right away. What mg do you have?
Dose is 57mg per pound of weight given orally twice a day for 7-10 days or if she's a fairly normal sized hen, give 250mg twice a day.
Work on getting her hydrated like you have been doing. If she'll eat a...