Thanks, everyone! I wish we knew more about this bloat/dropsy disease, and it just seems like bettas are prone to it as they get older. Bettas, when compared to some other fish, don't seem to have as long a lifespan either. Since we don't know how old they are when we get them, unless we know the breeder, then we just love and enjoy them while they are with us.
mysterem, Kenny hung on for about 10 days. He was bloated, but still active and eating quite greedily. That's when I fed him some medicated bloodworms. On the morning of the 10th day was when I suspected the worst would happen. So I'm hopeful that he didn't suffer too much. I answered your other post -- so far, I wouldn't think that Frisky has the same illness as Kenny.