I have an Oscar that only eats earthworms, freeze dried krill, and cut frozen fish. Tried starving him, but can't go too long without the above mentioned food items as it's what his tank mates primarily eat. So the Oscar is quite spoiled...
I feed my 2 O's earthworms, crickets, krill, jumbo bloodworms, shrimp and pellets. My O's prefer bug bites by fluval and top fin large cichlid crumbles, both pellets contain soldier fly larvae as the first ingredient. They dont touch any of the hikari pellets