I currently feed my 6 rbp cut up chunks of whiting from the store that has the bone in it. They will eat the bone closest to the tail but it gets too big further up. I also throw in whole bluegill around 5 inches long. They eat the whole thing including the skull. The rbp are currently around 7 inches and thick. They also eat bugs I find in the yard as well as shrimp, oyster, and worms.