I want to post a conclusion to this thread, mainly because future BYCers might run across it searching for information on how to treat a hen afflicted with Acites. While I was pleased with the initial outcome following aspirating the fluid from Nancy's abdomen, I would have done one additional, extremely important thing that night have helped prolong her life. I would have given her an antibiotic before and following the operation.
The day before Nancy died, I noticed the skin on her abdomen at the site of the puncture was bright red, possibly indicating infection. Looking back, Nancy tolerated the operation extremely well, and even had a better appetite than she had previously. But the next morning, she was lethargic with no appetite, so I believe infection had set in overnight, and it was the infection that killed her several days later.
If I ever encounter this situation again, I believe that aspirating the fluid in conjunction with antibiotics would give a much loved pet hen some additional quality weeks or months.
It's such a troubling decision as to WHEN to euthanize. I loved Nancy enough to do it, but I wanted to give her every chance first to recover. Just as I was holding her and looking into her suffering eyes, telling her it was time to end it, she died in my arms, sparing me that difficult task.