this has alot to do with what the breeder did when the pup was little, i know both of my german shepherds that are akc, the breeders handled the puppies feet when they were little up till they were able to go home...

my old GSD was not akc, and she was part of a 'accident' litter and the owner did not do that, it to was pure hell trying to clip her nails...

it might take one more person holding her down to do it, but you may want to try and get her used to you handleing her feet more without clipping...