Well, nature decided how I was going to handle the water bottles. We had big hit of snow with lots of downed trees and broken branches. Wires fell and I lost power.

So, in the dark, I rinsed each water bottle and refilled it with just the meds added to the water. No sugar, no vanilla. I kept each bottle in the same tub so no cross contamination. Now that the power is back I will wash all of the bottles again with soap to get out any of the sugar.

The rats are all drinking and the sneezing has almost completely stopped after 2 days. I can still hear the occassional sneeze but much less than before the Tylan. I can still hear congestion in some of them and they are sleeping more but I think it's moving in the right direction. No deaths since I started Tylan.

As to the source of the problem, I don't know. It did start to get cooler and I had the windows open with the fans running. I took in two new rats that I kept in quarantine for a week and they showed no signs of illness but one did die shortly thereafter. The other is still around. I'm open to suggestions as to the cause and how I can prevent a relapse.

Thanks