I'm a bit worried that you (the OP) are not actually seeing the reality of this situation. A puppy should be able to RUN... not just HOP. In the videos this pup looks like it can barely walk. I fear that you are glossing over a major problem that should not be ignored for the sake of this dog. Don't take this personally. Nobody is blaming you, but you really do need to open your eyes and see the problem that is before you.