If you feed them what they have been eating, they eat just fine. ..
"Ova is by far their favorite, followed by bloodworms then daphnia. If you gave them the opportunity they would eat artemia until they exploded. They also eat small pellet foods. Each fish is individual and its likely that they will prefer to eat some of the foods listed more than others, we can't say that every single one eats each type of food, we have many thousands of these guys and they are in big group tanks. Remember, these fish have been eating ONLY the foods that we listed since March. The biggest and most robust 10% were pulled out for sale in July." - Dustin Dorton of ORA