I feel for you Brenda, I went through it when my hubby passed almost 3 years ago & then I lost Sweetie that same December. And then I lost Titan in December/13. It does suck, big time. Especially when beardies don't show they're sick until they're really sick. At least you got the blood tests done & hopefully the antibiotics do their work. Because he's so run down, the shots are going to take a lot out of him, so keep up with the pedialyte baths and the probiotics in the afternoons. I'd give him two baths a day at this point. So for the syringe feeding, what I do to make sure it goes down, is I get the syringe past their teeth, then plunge the liquid down their throat. I've been doing this for a long time. I also "force feed" bugs, Lonzo spits them back at me (yuck) but I shove it back in & close his mouth if necessary. Once the first bug is in, the rest go down just fine. I've had to add Rubio to my list as he wasn't eating hardly anything & losing weight, too.
I read the results of Tracie going over the test results, and it seems he's anemic. So doing the slurry with mustard greens and bok choy (use baby bok choy) would be the best thing to do. Again, you use a large bore syringe (pharmacies usually have them) and you'll really have to get it down his throat. Not licking this time, he's too tired for that. I so wish I lived closer I'd come over to show you how to do that, as I've been doing it for years! So good luck, that seems to be the only way to get him healthy again. Tracie knows her stuff, she's studies a lot on dragons and has been helping me for 6 years. Do have a blender that will do greens? Just add a bit of water to the greens, then add the rest of the stuff. I wouldn't worry about protein right now, as I don't know if that would overload his system. Adding critical care would be necessary, a tsp of that and then a 1/4 tsp of carnivore care, that will all be gentler on his stomach. I used to add bee pollen to Titan's water, as can't get capsules up here, just granules, so had to melt them in hot water first. But if you get capsules, add a capsule to the slurry as well. It's going to be a lot of work for you, but it will be worth it, as it will get him better, it will just be slow as it takes forever for beardies to get healthy when they're not.
Good luck, keep me posted, if you have any questions, let me or Tracie know.
HUGS!!!!!