We adopted a bulldog 2 days ago. All of her nails but 3 are black- 3 (on the same paw) are white/pale and overgrown. She will not let us trim them (she let us trim the others). Also, all of her pads but the three associated with the pale nails are black. The pads with the pale nails are white/pink. When we try to clean the pads or touch them, she pulls it away as it if hurts. Any suggestions as to what the issue may be? She had a checkup with our vet yesterday, but the vet did not notice this issue.