Poor little guy...I've only had one experience with a beardie, a 6 mo. old rescue that was horribly constipated & starving after being kept on a diet of large crickets
only, & that ate some of the wood shavings he was kept on in apparent desperation. His abdomen was swollen & his legs were skinny...he strained at times to defecate
but nothing came out & he was weak. My vet suggested giving him a daily dose of mineral oil p.o. (which I did) but it was my hunch to soak him in mildly warm water
in my bathtub, which he seemed to like. The combination finally paid off...the extra hydration helped him defecate- he actually did 3 humongous dumps in the bathtub
on subsequent days, but during all his treatment I figured he needed a little nutrition also, nothing that would make his blockage worse but just something for energy,
so I gave him some Gerber's baby food...fruit, veggies, chicken...didn't matter, he liked it & licked it from the spoon. Once his gut was empty he was very skinny, but
he quickly went on to learn about all the good chow he'd been missing, & he was filled out & growing big in no time. Don't know that baby food is any better than the
stuff you're giving this dragon, but that's all I can suggest from my limited experience. Maybe even some applesauce or mashed carrots. You want him to like it so
he'll keep eating, feel better & want more. They do eat lots of veggies, have you offered any? Poor little dragon, I hope he makes it, he was probably bullied. (I'm
sure you know, but young beardies have a "big mouth" but shouldn't be fed any crickets other than tiny ones- they cannot digest those back legs & get blocked up.)