Let me start off by telling you that I am in absolutely no way an expert or really even a very experienced person with this. However, I want to tell you what my experience was like with my shepherd puppy, who is likely going to have to be put down in a week or two. Please do not let my experience scare you with your dog! Just be aware.
When I first brought my boy home at 10 weeks, I right away was unsure about his hind legs, hips, and feet as well. He seemed to wobble and to sway slightly, his back feet noticeably twisted outward when he walked, and he also dragged his back feet. I read back then that it isn't uncommon for a shepherd pup's hips to be "loose", and that this usually tightens up around 1 year. I decided not to worry about it, but I regret that now. I wish I had asked for an opinion from a vet or knowledgeable person.
As my boy got older, his back end got worse. The swaying was worse, it developed to "hopping", and eventually his legs gave out altogether. I went to the neurologist with him for the first time today, and the neurologist thinks that there have been signs of a neurological issue with Forrest since he was very young. These symptoms include what I have stated before: dragging of hind feet, hopping, swaying, feet twisting out when walking, standing with his feet twisted out. Forrest has a serious neurological issue that will change his life.
My whole point with this is:
I was concerned about my boy when he was very young, and having no in-person experience with shepherds, took his symptoms as common puppy things that would get better with time. For me, that was not the case. My experience is in absolutely no way normal or common. I would say that most people who have these concerns are probably just overreacting. I want you to know my story so that you can catch it early to make sure that it really is no big deal for your puppy. If you are highly concerned, I would say see a vet about it specifically. It can't hurt to get it checked out. It can hurt to not, as we see with my story. Best of wishes to you.