does not compute.
an now for more on topic posting... comparing the spider wobble to hip and elbow displacia in GSD's is not really the same thing. HD and ED negatively impact the quality of life of the animal, creating arthritis and sore joints and other problems that make it difficult for a dog (an active, people-pleasing creature) to do "its thing." Breeding for hip and elbow problems (or even not bothering to check for such issues before paring a male and female) are unacceptable to me. There is a very good reason that when I own a dog, be it a GSD, it will not be from American lines, and it will only be from someone who does all the proper testing (quality breeders folks, it doesn't matter the breed or species, quality counts).
Spiders, even those with a moderate (NOT severe/trainwreck) eat, breed, poop, sleep, and do everything that a normal bp without the wobble does.
I am planning to put spiders back into my collection, almost all of my favorite morphs are spider crosses. If i bred my animals and ended up with a trainwreck, I'd cull it. To me there is no sense in keeping an animal alive that is too wacked out to even eat on its own if it wants too. As a potential breeder, that is my choice to make, and it is a customers choice to not buy from me because i breed that morph.