I agree w/x3ro.
I found a 2 yr old (vet guessed at age) GSD mix that wasn't good about having her paws touched. I would have her sit then tell her "paw", and pick up her leg and then praise and treat. Also would run my hands over her legs and paws when grooming, rubbing/massaging her. Then I started holding a paw and saying "touch", and touching the nail clippers to one nail, then praise and treat. Gradually built up to clipping one nail (saying "touch" then clip, praise and treat). Now I can easily do all of her nails.
I found a 2 yr old (vet guessed at age) GSD mix that wasn't good about having her paws touched. I would have her sit then tell her "paw", and pick up her leg and then praise and treat. Also would run my hands over her legs and paws when grooming, rubbing/massaging her. Then I started holding a paw and saying "touch", and touching the nail clippers to one nail, then praise and treat. Gradually built up to clipping one nail (saying "touch" then clip, praise and treat). Now I can easily do all of her nails.