I had the same thing, and about 10 quadrillion of them summer before last, when I began stocking. This past summer, the gills simply anihilated the things. Any of them stupid enough to venture away from the immediate shoreline became just a moving version of a fish food pellet.
On a somewhat related subject, we built a scoop for the front of the ATV out of a piece of square metal ductwork and we'd drive around the area with it hanging at the same height as the top of the brome grass. You could dump hundreds of spiders, caterpillars and grasshoppers from the bridge and watch the frenzy.
Not PETA approved, but the fish loved them.
