He looks very healthy and if he hasn't lost weight then he should be good. They are built to take periods of time with no food. And superworms are fine in moderation, but dubias are better. You can gut load them with the same veggies that you would ave fed Spike, that way he gets the veggies from eating the well fed dubia may perk up + eat some , if he does be careful not to let him get stuffed. Just 5-6 at a time would be fine.
Yes, some beardies will get full and then not eat foe a while when they're inactive, other dragons eat more than they need and become overweight. But when you find a good reptile vet ask for a full blood panel to check all his levels. [ glucose, liver enzymes, red/white cells, etc ]
When I put the probe in I saw his basking spot get to around 43-46 degrees.
I got my thermostat a few days ago, and now his basking spot is at 38-39 always. Sometimes it goes a little under that, to 37 but then it heats back up after a few moments.
He's alot more active and he's been pooping more when I take him out. (He NEVER poops in his own cage lol)
He does look good & that's great his weight is stable also. I hope he likes the roaches & the
vitamins you have coming for him.
If he was too hot then that would be a huge reason why he wasn't eating much or acting quite
100%, either. I'm glad you got that figured out, he should start doing a lot better now.
He only needs vitamins a couple of times a week. So, when you dust the insects with them,
only do a couple of dustings per week for him. The calcium he needs 4-5 times per week.