This is an excerpt from the Fish Disease section on this site:
This is not really a disease, but a symptom of a bacterial infection and possibly malnutrition. There are medications available but try to increase the quality of the water by performing a 25% water change every other day and increase the quality of fish food given. If your fish's condition doesn't improve, try the medication. Your local pet store should have medication for this disease. Remove any carbon filtration before using medication because the carbon will remove the medication from the water.
I think I would go right to medicating at this point. I don't know much about Dropsy, but I think that by the time they go pine cone, there is a much greater chance that they will not make it.
Good luck, I wish I could help more. I felt bad that no one answered you, so I figured this would be better than nothing.