Depends on the line and the particular confirmation of the dog. For German Shepherd's specifically, dogs from "working lines," tend to be absent of these issues

Depends on the line and the particular confirmation of the dog. For German Shepherd's specifically, dogs from "working lines," tend to be absent of these issues because their breeders focused more on the dogs temperament and behavior than confirmation. Ergo, you have a sturdy, intelligent, willing dog with minimal health problems. I am a professional trainer. I have 2 German Shepherds, one is a "show line" and the other is a "working line." The showline dog has congenital health issues and grew up with terrible confirmation. The working line dog last weekend rolled about 150 feet down a mountain while chasing his ball and just walked it off. Having a mixed breed dog can be a great thing, but it is no more a guarantee against confirmation and health issues than any other dog. The real issue, IMO, is that clients/buyers don't know nearly enough about dog breeding to know if what is being advertised is actually a good thing.