that sucks hip diplasia is all too common with shepherds these days , i attribute it to poor genetics and improper diets all those big brand dog chows don't necessarily have all the nutrient requirements for large breed dogs , you have to supplement with stuff like selenium supplements for good growth and development , but vets won't necessarily tell you that because when your dog falls ill it's their pockets that benefit, don't get me wrong there are alot of good vets out there and i am actually studying to become one i got 3 years to go though lol