The GSD as I recall reading was set at somewhere about 8% wolf, the originator of the breed calling for breeders not to add any more wolf blood to the breed as he felt he had found the perfect balance. But keep in mind the GSD clubs now deny any wolf heritage in their dogs at all, and all publications after 1923 I believe have been revised to read wolf parentage as unknown , instead of as originally stated. So in other words, they have rewritten to eliminate any indication that that they were developed with wolf blood period.
Based on the GSD you would have an argument to fight the UKC, but without original documents dating back before 1923, or the original german stud books, you may find you lack any solid evidence.
In the 1990's scientists reclassified wolves and dogs concluding that they are in fact the same species, therefore there is no such thing as a wolf hybrid(as applied to dogs)and all dogs are essentially domesticated wolves. So how many generations away from the wolf is required for domestication? This is the question you need to pose to the UKC.
In their(UKC) infinite wisdom they chose to state that any wolf heritage in a breed would eliminate it from being accepted, since it has been proven that all domesticated dogs are descended from wolves, will they remove all breeds from the kennel club?
I read the petition, it is a rant, it will solve nothing, you have to fight on the basis of policy and where that policy is in err...you need to have a legitimate argument and provide evidence and proof that they are in error.
Respectfully,
Stands Alone
(Fighting the AKC as well
)