I've already got him under a new UVB bulb and am giving him calcium syrup every day. Yesterday I started mixing in small amounts of Critical Care and baby food.
His arm bones have already started to spread out and thicken. He'll probably end up walking on his wrists like Peanut does.
Dragon reminds me a lot of Peanut when I first rescued him. Dragon is much smaller at 18 grams. Peanut was 41 grams.
He's got a long road ahead, but I think he'll be able to recover from the MBD.