I remember reading something to the effect that trout under 10 - 12 inches don't really eat all that many fish (excluding browns I guess). I believe it said 90% of their food would be insects and crustations, beyond 10 - 12 inches it said 70% of the diet is fish. However as your feeding they may simply never get hungry enough to bother chasing minnows, the energy required to chasse the minnows may be too much trouble for the return they get. If your consistant and regular with the feed they may have figured out it's easier to wait for the food to fall from the heavens than chassing minnows.

Chris H.

Chris H