I have an rtcXtsn that I got at the end of may. He was 2" at the time (11" now.) Initially he'd eat feeders and nightcrawlers. I've gotten him 100% off feeders and have gotten him to eat thawed frozen shrimp (with cichlid pelets stuffed in them,) nightcrawlers, whitefish fillet, and squid.
Currently working on getting him to eat immitation crab and other stuff to give him a more varied diet.
I also got him to eat chicken liver, though I didn't like messing with it and won't feed it to him anymore. Kills the water quality very quickly and is a mess to work with.
Hope this helps you some (=