We rescue and rehome u cane verse or stop MBD with Reptisun 10.0 T5 and lots of protein And calcium powder.I wouldn’t hold your breath getting his legs back to normal. I work at a pet store and we got a beardie in who was dealing with MBD for almost 3 years before we got her. After 3 years of proper lighting and care she still hasn’t gotten use of her back two legs yet. I don’t know if your beardies MBD is as developed as hers but that’s just a personal experience I have with it