well as the title says, some of my fish are a bit retarded

. I have a 225 chichlid tank with some largish malawis and a rd and a jag, all are around the 10inch mark, some of the malawis are smaller. the problem is that the rd and jag only accept pellets i cant get them to eat anything else, the jag occasionly accepts feeder guppies though. However that is hardly a varied diet, what should i do
