Hi there! Sorry your guy seems to be on strike
Can I ask how you are keeping him
hydrated? Are you giving him 20 minute soaks? How often? Have you tried any other kind of feeder? Soft bodied worms such as butterworms, reptiworms, hornworms? Or even dubia roaches (if they're legal where you are, I didn't see).
I'm only asking because I have been dealing with something very similar with my boy. I syringe feed him in-between days he won't eat but he also gets oral fluids as well as daily 20 minute soaks due to the change in season and the humidity being so low.
Our beardie decided he liked the butterworms and will do well when offered those, or the soft white dubia that are freshly shed. Beardies can go long periods of time without food but
hydration is most important. If you're concerned, I would suggest making sure his temps are correct (double check husbandry, always) and if you'd like to, you can always offer him stage 1 baby food chicken and squash or sweet potato from a baby dropper or syringe. It can't hurt. I'd be very careful, though. You're not necessarily "force feeding" him as you wouldn't want him to choke. Most beardies love it anyway, it's sweet and some will lick it right off a spoon. I'd start by putting a drop on his snout and watching to see if he licks it off.
Good luck and keep us posted! You might want to have a fecal done on him soon as well. My beardie had pinworms (clear now, thank goodness) back in August. If you go to
http://www.beardeddragon.co they have mail in fecal kits to test for pinworms and coccidia.
Good luck!