So I found my missing chicken this morning. No injuries or anything, but on her breast she's got this huge (a little smaller then a baseball) sack, it seems fluid filled. She can't keep down water and she has runny greenish white poop. She closes her eyes a lot and she keeps on throwing up water whenever she drinks it. I thought she was dehydrated so I had her drink water. She dipped nearly her whole head in the water multiple times and then threw up water. What is this? How can I save my angel? HelP!