He is a little fatter each day. And the scales are definately "pineconing."
I haven't done anything so far, and I'm sure the two-day delay has probably sealed his fate - if anything would even work, anyway. I have a feeling that what Savannah says is true, and that even if he did respond, he will never be a strong fish again. I've had the same happen with my bettas. Recover, only to die not too long down the road.
He's still eating, which is good, because they say there is medicated food you can give, along with warm temps and salt. But catching him is another thing, and would involve stressing all the fish in the pond. My best chance to catch him is feeding time tomorrow morning. Which means another day lost.
But looking at him, he's pretty puffy. I just don't think anything is going to work. It's hard, because, other than his extended shape, he seems fine, and it's hard knowing he's going to die.
Here's something I was sent by one of our Pond Society contacts:
Regrettably, the prognosis for Dropsy is not so good. Dropsy is usually caused by bacteria damaging the kidney which causes edema in the fish. The accumulation of fluid inside the fish can cause the eyes to pop out and the body to swell which can also cause the scales to pine cone out. By the time the fish swells up the damage to the kidney is so severe that recovery is very difficult. The best treatment for dropsy is an antibiotic injection. The next best thing is a medicated food such as Medikoi (that is if the fish will eat).
You can assist the fish by adding 3 pounds of pure salt per 100 gallons of water. This will attain a salinity concentration of approximately 0.375% in the water. Add the salt gradually at the rate of 1 pound of salt per 100 gallons per day to allow the fish to adjust. Leave the fish in the salted water all the time and not as a dip. This will help relieve stress, reduce the effort the fish must expend in eliminating excess water from the kidney and direct all of his energy toward healing. Be sure and use pure salt. Do not use iodized salt.