Yep, that was a very sad day...  After keeping them for 5 years, one by one they waisted away.  I tried treating them for IPs countless times.  Hubby thought the biggest Pigeonblood (prettiest one too) was pushing the others around & not letting them eat.  After all but the Pigeon died, I conceded to the fact that I would just keep the bully as my main centerpiece for the tank & buy some colorful tetras as dither fish for him.  Then one day I found him dead, fat as ever, in the tank.