i'd say some broken bones ???? is it housed with any other dragons , might have gotten mistaken for food by another hungry dragon.....or fallen, got it caught ....if it tried to jump down from a ledge and the claws got caught and twisted it......
it looks clean so probly not and infection from poor housekeeping or faeces clumping around the toes.
wont know for sure with out an x ray.....vets can give you some liquid calcium that helps heal bones real quick