Well that contradicts my bit, except, for the treatment. 5 out of 7 of my loss came from treated hives. the other 2 was cleaned out by robber bees and wax moths set in. 2 out of 10 or 12 is about what I loose every year. "Also" My losses came from aged queens, 3 yrs. and older. "Also" I have not entroduced any new stock in a while. Treatment and worn out genes for those who don't migrate. For those who do, too much stress. Thats my 2 cents.
Mine do not get moved.