One other potiential symptom that came to mind is yawning.
I do have miconazole with the tubes, and a generic on hand. If she's not eating enough she does appear a little scrauny. I don't have a tube on hand to tube feed. I'll have to see if I can locate a feeding tube tomorrow.
She was in with her mates that picked on her until she was moved to a different pen. Didn't look all that terrible just a tad fearful, but still full of life, but I'm not very familar with Leige.
She gobbled up some scrambled this morning. I do have some grit available to her, and I have everyone on epsom salt flush via drinkers.
Do you have photos of her and her poop?
I would not put epsom salts in the drinkers. A flush is given perhaps 1-3times a day all at once, then the bird drinks their normal water. Epsom salts is very dehydrating and can cause diarrhea, so she needs fresh water. A flush should only given when there's a clear crisis need to flush the system, say you are treating severe sour crop, an impaction or trying to flush a toxin from the body.
Was she a lone bird shipped or shipped with more than one in the box?
She's likely suffering from shipping stress.
If you don't want to go with Corid for now, give her sugar water (1tsp sugar to 1cup water).
You mention she's scrawny, but if this is a Pullet and a Liege Fighter, then she's going to be in the slim built but get heavier as she ages, but won't have the body type of say an Orpington.
Where did she come from, a breeder or from Greenfire?
I'd feed her her normal feed, see that she's drinking well, omit that epsom salts all together. Provide grit (crushed granite) free choice. If she's new and alone, I'd keep her separate from the existing flock for an observation period, then once satisfied that she's healthy, begin a slow integration.
