I suggest ordering a culture of Micro worm or hatch baby brine shrimp I know from experience that the fry will not attempt to eat none living foods until about 3-4 inches and then you can introduce the juvenile fry to peices of fish and pellets.
You will have to hatch them. I tried the instant baby brine shrimp and it was ignored but the live instantly kicked in the instinct for the fry to eat.