Well last week i went out to check on my bees since it has been very good weather where i live. But one of my hives seemed odd. They didnt react very well the smoke, like had slow reaction time to it. And they seemed rather lazy. I shook a frame of bees off and then i really made them angery and had about 10 bees spin around my head and knock into me. What could it be? they have great honey income, and mite levels are low.