Feeding 4" JD

I have noticed more and more that my JD doesn't bother with the bloodworms I used to feed him/the tank he looks at them and then kinda decides its not worth his effort, can I feed him maggots? Or is there some thing else that would be better, muscles are just a bit too big for him, small prawns maybe, again might be too big? Should I just cut them up?

He still eats the Tetra pro color wafers fine which is his staple diet along with Tetra pro vegetable wafers.

Suggestions welcome