My 2 yr old hen keeps throwing up a slimy yellow muscusy fluid. I've been working with her since Tuesday and she is skin & bones. I can't get anywhere with her. She has been drinking some water w/ a powder terramycin dissovled but there has been no improvement. She is also contorting her neck and head in weird positions, more so today than any other day. I wish I knew what to do for her. 1. Stands in one place for hours 2. Eyes are closed, feathers are puffed out some. 3. When eyes are open the pupils are dilated most of the time. Sometimes she "comes back" and they go back to normal, then she shuts them down again 4. Is not really pooping at all. 5. Never did see any bloody poop. 6. Other 9 chickens have no symptoms. 7. Insulated 6 x 8 coop, well-ventilated, deep litter method, heated water change 2x daily, feed is layer pellets and scratch, - supplement with leftovers every other day or so. 8. Use 1 heat light while temp is under 32, added another when temp goes around 15 & under. crop is empty. does not appear to be egg-bound.