I guess if they stay alive lol. With the convict fry Ive had in the past, I couldnt really "see" them eating, but they stayed alive and kept growing so they obviously ate. I just crushed up a bunch of pellets ,flake ,whatever, into a fine powder then mixed with a little tank water and squirted it out with a syrenge over the fry...worked for me. Hope this helps, sorry you didnt get any replys before.