First thing I think is, still not eating, maybe pain still too much.
Wondering what is her dose of Meloxicam?
Pain definitely messes with appetite, but so can dosing that’s too high - especially in older hens. It can irritate the stomach and make them feel worse rather than better. So if she’s getting, say, over 0.45mg/lb twice a day, it might be too much.
That said, not enough pain relief will also put her off her feed.
You're right to be concerned about inappetence. When a hen this age stops eating, it often means the body’s under a lot of stress. Sometimes it's pain, could also be internal bruising from fall, or even organ strain after a fall.
Here’s a few gentle ideas that might help:
Pain re-check: If she’s not more comfortable after a few days, maybe talk to the vet about adding a stomach protector (like sucralfate) or trying a tiny break in dosing to see if her appetite perks up.
Aromatics and warmth: Warm up her wet mash to body temp, and try poultry electrolytes in her water. Even things like warmed bone broth (no salt, no onion) can spark interest. Sometimes some stronger smells, a little garlic or a tiny amount of tuna can act as an appetite stimulant.
Energy first: Try a little sweet potato mash or baby food (meat varieties seem to work best). Sometimes older hens will go for soft textures if their joints are sore (and what the reason is, I can not say. Must be a chicken thing).
Hand-feed calmly: She might respond to being hand-fed just enough to trigger the hunger reflex again. This has worked for me before.
Leap not quickly to a pharma appetite stimulant. If something is as yet undetected an she can't eat, an appetite stimulant can make her just a bit uncomfortable when one instinct to not eat right off meets pharma impulse to eat.
I know the worry when an old lady hen goes quiet. If she’s still got that spark in her eye, she may yet rally once the pain is under better control.
Prayers for Charlotte from Jesse Lee Turner.