idk about that they are azuls, which means they were wroth a good amount of money, I would wait a little longer till they get bigger, something that nice & expensive you have to be careful what you do.
i think i will depend on each individual fish (ST) and will also depend on if your ST has been fed live food before.
BUT i still wouldn't try it and risk the consequences. I would grow them up until they are big enough to not be bullied on.