I had a hen who started swelling up when she was about 6 months old. She was a little smaller and paler than the other buff orps.
After a few visits to an avian specialist, I decided to take care of her myself. The vet said there was no way of knowing the reason for "ascites", that we needed more tests, but I decided to forego those.
I drained her abdomen of clear fluid about every 3-5 months for 4 years. She would be fine in-between times. The fluid sometimes would be 3-4 cups!
I always kept her separate from the others, since she wasn't as strong and they would pick on her.
Even though the vet refused to show me how to do it myself, I watched her when she did it, and learned that you should do it to the side of the abdomen......over by the right leg. I had intracaths, which were nice because they wouldn't puncture anything.
I did notice that it was easier to drain her more completely, the more fluid she had in there.
The vet said that sometimes if you drain too much fluid out at once, they can have a cardiovascular collapse. Fortunately, I never had that problem.
What I noticed was the closer she got to needing drained, the more trouble she was having with breathing.
One time my hen got so compromised from the amount of fluid that we couldn't even hold her to drain her, since she would quit breathing.
That's when we learned to put her on top of something higher, so we could drain her without holding her.
Finally, after 4 years of this, she passed quietly in her little pen.
RIP sweet Nobie. What a trooper she was.
Yes, I agree......if you don't feel comfortable draining with a needle and syringe (it can be tricking disconnecting the syringe from the needle to empty it and then connect it again), I have suggested to people that they put a couple big needle holes in the skin, and let gravity work its magic.
I had another hen with a swollen abdomen, but the fluid I got out was a bright green. She didn't last long. If the fluid is clear, I think its a better prognosis. You just might have to do it on a regular basis.
I used to put my hen on 2-3 days of antibiotics when I would drain her (per vet's instructions), but learned that probably wasn't necessary if drained in the house under fairly clean conditions.