One of my hens didn't look well Thursday so I brought her inside. Friday she was vomiting brown stuff so I assume she had sour crop? She was vomiting so much she couldn't breathe. Once that calmed down it felt as though her crop was empty. I syringe fed her nystatin (human form) and she tolerated it well. Vomiting stopped and she slept most of the day. She also took water from a syringe throughout the day. Last night she was drinking on her own and even ate a little wet cat food. Seemed to be turning a corner. This morning she is back to the vomiting again. What should I do? There aren't any vets around her that she chickens.