as stated before feeding LFS feeders is not a good ideal, even if they look healthy. best diet for your jag is a good quality pellet, if you want to feed a protein treat ones a week or so I suggest super freeze dried krill soaked over night in boyds vita-chem,.
he may be digesting, I would not feed for a week or so, this is fine, they can go up to 3 weeks with out eating with out any health issues. IMHO as always.