Most of my guys actually seem to like their pellets the best. Weird, I know.
Howie gets excited for freeze dried blood worms, but doesn't seem too thrilled for the frozen/dethawed ones, and not much interested brine shrimp, either. Rosco will eat anything, but since he's blind in one eye, it takes a little bit for him to find his food. Percy turns his nose up at everything but pellets. Cali is a piglet and eats everything. And, I haven't tried much with the new guys, yet. Ferris wasn't too sure about the freeze dried blood worm, and Atlas hasn't wanted to eat anything, yet.
The only cure for ignorance is education, and bullying or attacking someone is no way to educate them.