So, I am hoping to get some advice for a sick hen. She is a one year old mixed breed banty. She is limping on one leg, kind of dragging it behind her, she kind of flaps and falls when trying to get somewhere. She just lays quietly with her eyes shut, and she is quite thin. I can feel her breastbone. Up until a few weeks ago had been laying regularly. She is losing a lot of feathers, they are breaking off about a centimeter from the skin, and the part of the shaft that is left in the skin looks like a bluish/grey pin feather (She is black in color) and the rest of the feather looks pretty good, no ragged edges. I have looked for mites/lice and have found nothing, no eggs at the feather base. She is not showing any respiratory symptoms. She is kept with 4 other chickens that seem healthy and 2 healthy ducks. What should I put her on? I have a few antibiotics, and wormers. Should I try delousing her with powder? She is not interested in eating and have been feeding her honey water my syringe. I am going to get liquid baby vitamins today. Any advice on what this could be or what I should try would be greatly appreciated. Thank you.