I just put some res in my forage pond it has minnows and crawfish plus a few crappie to try for a spawn. The minnows will eat bread and fish food, have not seen the crappie at all. The res don't appear to be eating anything but they spend a lot of time in the vegetation on the bottom. What can I use for supplemental feed for my res. They are about 1"-2" is it too early for an automatic larva feeder?