Fathead Minnows and ghost shrimp if they are small and only taking live food would be good, although its best to get them on prepared food as soon as possible otherwise feeding them because a wallet breaker. My little ones are on minnows and the big ones feed on nightcrawlers, market shrimp, freeze dried krill, hikari massivore pellets, and the occasional native feeder sunfish of various types when I have the time to catch them ~Trent