Some vets are just not real good- here is a website to find a reptile vet in your area
www.arav.org
Please look for calcium w/out phosphorus-- you can look on line for both- I think www.reptilesplus.com has them both you want D 3 and calcium w/ out phosphorus
Buy RepCal brand it has vitamin D3 in it and has Cholecalciferol in it which is the best form. And Yes 99.9 he has MBD please stop any worms. Jait So Dubia Roaches and crickets he needs lots and lots of protein once he starts basking and uvbing like a lot to repair his bones. My 4 yr old rescue was eating 80-100 large crickets the best uvb and I got her to eat the staple greens and veggies also. Herptivite vitamin powder twice a week u can do 3 times for him on his second feeding try feeding 3times a day treat him like he’s younger because of the lack of UVb he was without and his fragile bones. Also, as I said NO mealworms ever thatsbthe cheaoest food & horrible for them and No super or hornworms till after 1.5 yrs old as treats only because very high in fat. Superstar u can give more of but not earlier than 1.5?urs too harsh on their tummy. Dubi Roaches are clean and safe and u can place them in a doshbof watwr so he gets hydrated tooOk here’s what you do. 1st Buy the Reptisun 10.0 T5 ASAP for the 40 gallon/36 inch long tank tank u need to buy a 28-30inch long Reptisun and Holder it’s on amazon. It should cover 70 prcnt of the tank Its the best and only UVB to use. When basking he shoidl be getting Uvb and heat 2gether so it’s placed like the pic I’ve posted & needs replacing every 6mnths. Place it in the back and get the ZooMed 100watt basking bulb place it like the pic I have shown you. Also, calcium powder RepCal brand dusted 5 times a week on the crickets or Dubias or veggie plate; in your case maybe do everyday for 3-4 months to make up for lost time. Next find another reptile vet ask and google because he needs calcium shots ASAP but maybe u can bring him back to life. Also please ONLY feed Dubia roaches and crickets only; the super and meal worms are destructive to the tummy & meal worms impact Beardies and super worms can only be given after 1.5 yrs of age. Bath him daily to get him to poop so he can clear his tummy and place a plate of staple greens means: dandelions, mustard, collard greens, endives, yellow squash, snap peas, butternut squash and green beans cut up small so he can eat; mix 2-2 greens w/2-3 veggies a plate every mornign one hour after basking place it in the cold side ahow it to him too. But he needs the uvb and ZooMed clear light ASAp. NO colored bulbs ever & at nite pure dark. I’ve revived Beardies that we’re almost dead and so many ignorant people hat don’t give the right UVb his bones are very very brittle u will have to Pic him up and place him on the basking spot temp should be 100-102 not higher since he’s 8mnths old and make sure u place things he can climb on to get to his basking and like a stairway because he’s very very weak. Also never ever feed him until after minimum 1 hour of basking if he’s not warm he can’t eat. Let him bask and bath him ciz he needs to poop still give him lots of water and do the food changes ASAP with calcium and No worms of any sort. Look at the pic I have and replicate it. My uvb covers the entire tank because I revived her; u can buy a 36 inch one but they have to b able to get out of the uvb at times. Yours needs all the uvb he can get the brighter the tank the healthier the Beardie. Work on that and let me knwk