I have 3 peacock bass in a 20 gallon aquarium, (grow out tank) 2 of them about 2 1/2 inches long and one about 1 1/2 inches and I’ve had them for about a month maybe, and I’m feeding them bloodworms everyday, but the smallest one won’t eat them anymore. At first he was the only one that ate them, now only the 2 larger ones eat them. He is very very shy and I don’t know what to feed him. HELP!