I have been trying to research the best lines of breeding to fit what I'm looking for in a GSD. DDR, Czech, ect. I want a working dog that will socialize into home life around kid(s) that visit (family) without worries and still have protective qualities around the home against strangers. But i also want a GSD who would do well competing shultzhund. A true multi-tasker. But i also want to look for qualities limiting potential physical ailments in the future as I have had dogs that suffered hip problems and other ailments which can be attributed to breeding and wish to forgo that if at all possible. Any good ideas out there?