I think it's easier if you're able to seperate the bichir to a smaller tank by itself, and fast it until it starts going for pellets.
I've been able to get my delhezi, sens, and endli's to take pellets, but the other wild caught specimens would rather starve even with concave bellies so I gave up.
The way I see it now, if you want to get into bichirs, you pretty much have to plan on buying raw market shrimp and earthworms lol
A great idea I got from Rich is to thaw all of the shrimp you buy and cut it up and seperate it into portions that way you don't have to spend time defrosting the shrimp every time you feed.
HTH