try horn worms
www.greatlakehornworms.com
my beardie does not like crickets my book on dragon say romain lettuse has.07 grams of calsuim or something like that it's good for them my dragon likes it "the bearded dragon manual" get it it might help.... my dragon wouldnt eat crix but wulf down veggies and he was a baby, this worms are fed a diet for them and ur dragons health My dragon piggs out.. also try changing your substrate to play sand he might have ate the substrate when u weren't looking also my own tip give him/her a bath warm water once a week hopfully he will poop if he does that good it help with digestion and rehidrates them... i warm the tub up with hot water then drain the tub then i add warm water just enough to cover the tub the fare side is very shollow do my dragon can choose what he want if he want the deep end or shollow and that way he can move around if he likes i keep a eye on him at all times..
anyways just some tip tell me how it goes.