I caught some bluegill Monday for flathead bait. I got a call from a friend and he had hay in the field that needed to be put up so plans were quickly changed. I was not able to get back to the pond until Wednesday afternoon and about 1/2 of my 'gills were dead, 12 to 14. I had checked them Tuesday evening and they were doing fine. Any ideas what may have happened? They were in the shade of my dock.