To me she looks very overweight, which can definitely take its toll on young joints. As for movement I think her gait is very puppyish, but she is definitely very cowhocked. Hopefully someone can chime in on experience as to whether it is something that puppies can outgrow.
For the raw diet, a well put together raw diet shouldn't require additional supplementation, and in fact you can over supplement and cause problems with development. The most important and easiest to overuse IMO is calcium.