>What we find amazing is that we have sampled about fifteen yards so far and
>not found one mite.  We know we have varroa.  Where is it?

I was thinking about the comments you had on your site about not finding any
mites. Maybe you need to run a test by putting in a sticky board on a hive
and then after a day or two try the new mite roll. If the board shows mites
and the roll does not then you know there is a problem in the testing method
used.