We need a lot more information! The specifics of his previous care (diet, supplements and dosages, lighting), a photo so we can see the extent of the MBD, and how you are caring for him now. A lot of cham problems are attributed to MBD but without knowing a lot more we can't even begin to work on it. Even overdoses of calcium and D3 can result in symptoms that look similar to MBD. MBD can be treated...or at least halted with good husbandry if it isn't too far advanced. There are lots of chams out there with some degree of MBD that are alive today...maybe a bit bent, but have a decent quality of life.