There is a white GSD in our working dog club. He's healthy and robust but he's got temperament issues that would preclude him from being what anyone would consider a good GSD. He's not a real strong dog though, and really shouldn't be doing the type of training we do at the club. He'd be a good obedience dog, but bite work is not something he'll ever be good at. He's fearful and shows way too much avoidance when the decoy puts any amount of pressure on him. To me, that's what you get when you have a GSD that is bred for color or other traits, like looking nice in the show ring. The breed's other characteristics are watered down too much.