> ...a year ago we fed our bees thymolated syrup in the fall as well as 
treating
 > with apiguard.  We had a 100% winter survival.  Our hive count is 
small (9) plus 2 nucs.

Yes.  I fed on account of good reports I had heard, but here is the key 
point:
Were you depending on hygienic behaviour as a large part of you varroa 
control?  I
might have been since I was using, in part at least, stock bred for 
varroa tolerance and
I wonder if the thymol affected the hygienic response of the bees.

I was not using much in the way of varroa treatment beyond splitting and 
one OA drizzle
annually previously with apparent good survival.

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