My boyfriend has a young bearded dragon and he sent me a video of her laying down all of her legs except the back left leg was normal. The back left leg almost looked like it was completely numb, she had it laying flat and sprawled out and it was slightly twitching. Her other legs were taught and holing her up. I don't know much about beardies or MBD. I can try to get him to take a picture next time she does it. I don't think he has a uvb bulb and I think he might supplementing with calcium w/o D3. Do you have any suggestions he can improve on? Does this seem like an MBD related thing? I wish I could help more but I haven't ever kept a beardie.