He sure is adorable!! I love his poofy coat and dark color! I'm a sucker for those dark coated GSDs
. What I noticed, is when he runs his back feet seem to 'hop' together. His hocks seem to be turned in quite a bit, too. Is he swaying left and right when he is standing or is that the camera? I am not an expert, but I would have a vet look at him for sure.