Frankie, Turken/bantam Cochin hen hatched 7/11/23 has suddenly become lethargic and was disinterested in food but still eating a little, now has completely stopped eating. She’s still drinking but has lost a good amount of weight, doing the whole standing poofed up sick bird thing, but still energetic enough to run from me. Breathing normal, no nasal discharge, eyes clear, no visible parasites, no muscle weakness, vent looks normal and clean, comb and wattles are nice and red, no injuries or broken bones and there’s no egg that I can feel in her abdomen. The only thing I can see or feel that’s off are her wing feathers. They almost look like they’ve been chewed on? They roost 4-5 feet off the ground depending on what perch they’re on, so I don’t know what could’ve chewed on her, if anything. It’s only her wings. Her sister is going through a hard molt right now, but this is different. They were all wormed in September. They eat a locally milled 20% protein feed with free-choice oyster shell. Nobody else is showing any symptoms. Any ideas? I’ve started her on vitamin B and oxytetracyline.